1 − 2 + 3 − 4 + ⋯, 1/2 − 1/4 + 1/8 − 1/16 + ⋯, 1 + 2 + 3 + 4 + ⋯, 4.3.2.1., 1/2 + 1/4 + 1/8 + 1/16 + ⋯, 1 − 2 + 4 − 8 + ⋯, 1 + 2 + 4 + 8 + ⋯, 4, 3, 2, 1, GlcA-beta-(1-2)-D-Man-alpha-(1-3)-D-Glc-beta-(1-4)-D-Glc-alpha-1-diphospho-ditrans,octacis-undecaprenol 4-beta-mannosyltransferase, 4-(2-carboxyphenyl)-2-oxobut-3-enoate aldolase, 2-oxopent-4-enoate hydratase, 2-hydroxy-4-carboxymuconate semialdehyde hemiacetal dehydrogenase, Chrysler 1.8, 2.0 & 2.4 engine, 2-8-8-4, L-2-amino-4-chloropent-4-enoate dehydrochlorinase, 1-pyrroline-4-hydroxy-2-carboxylate deaminase, 2-Hydroxyacylsphingosine 1-beta-galactosyltransferase, 4-hydroxy-3-methylbut-2-en-1-yl diphosphate synthase, 4-hydroxy-4-methyl-2-oxoglutarate aldolase, 2-Amino-4-deoxychorismate synthase, D-Man-alpha-(1-3)-D-Glc-beta-(1-4)-D-Glc-alpha-1-diphosphoundecaprenol 2-beta-glucuronyltransferase, 4-alpha-D-((1-4)-alpha-D-glucano)trehalose trehalohydrolase, South African Class Experimental 1 4-6-2, 4-hydroxy-2-oxoglutarate aldolase, Beta-D-galactosyl-(1-4)-L-rhamnose phosphorylase, 2-Amino-4-deoxychorismate dehydrogenase, 1-phosphatidylinositol 4-kinase, Scyllo-inosamine-4-phosphate amidinotransferase, 2-4-0, 3-hydroxy-2-methylpyridine-4,5-dicarboxylate 4-decarboxylase, Exo-(1-4)-α-D-glucan lyase, 2-4-4-0, 4-Hydroxy-3-methylbut-2-enyl diphosphate reductase, Chalcone 4'-O-glucosyltransferase, Lactosylceramide 4-alpha-galactosyltransferase, 4-oxalocrotonate decarboxylase, Jaguar Mark 1, 4-APBT, 2,5-Dimethoxy-4-sec-butylamphetamine, 4-oxalmesaconate hydratase, 2-chloro-4-carboxymethylenebut-2-en-1,4-olide isomerase

4-hydroxy-2-oxovalerate aldolase, 1-(3-Chlorophenyl)-4-(2-phenylethyl)piperazine, 4-trimethylammoniobutyraldehyde dehydrogenase, Flavonoid 4'-O-methyltransferase, 4-phosphoerythronate dehydrogenase, 2-hydroxychromene-2-carboxylate isomerase, 4-carboxymuconolactone decarboxylase, 4-8-2, 4,5:9,10-diseco-3-hydroxy-5,9,17-trioxoandrosta-1(10),2-diene-4-oate hydrolase, 4-hydroxyphenylacetaldehyde dehydrogenase, 5-dehydro-4-deoxyglucarate dehydratase, SJK(C) Chung Hua Batu 4 1/2, 4-formylbenzenesulfonate dehydrogenase, Cycling at the 2008 Summer Paralympics – Women's individual pursuit (LC 1–2/CP 4), UDP-2-acetamido-4-amino-2,4,6-trideoxyglucose transaminase, 4-alpha-glucanotransferase, 2-hydroxyhexa-2,4-dienoate hydratase, Octopamine dehydratase, 2,1-fructan:2,1-fructan 1-fructosyltransferase, 5-guanidino-2-oxopentanoate decarboxylase, UDP-4-amino-4-deoxy-L-arabinose formyltransferase, Dermatan 4-sulfotransferase, Rhizobium leguminosarum exopolysaccharide glucosyl ketal-pyruvate-transferase, 4-6-2, Beta-apo-4'-carotenal oxygenase, Quinoline-4-carboxylate 2-oxidoreductase, 4-hydroxyglutamate transaminase, Pyrrole-2-carboxylate decarboxylase, 4-Dimethylallyltryptophan N-methyltransferase, 1-phosphatidylinositol-4-phosphate 5-kinase, 2-Hydroxy-4-methylbenzaldehyde, 4-nitrophenol 2-monooxygenase, (+)-Caryolan-1-ol synthase, Dolichyl-P-Man:Man6GlcNAc2-PP-dolichol alpha-1,2-mannosyltransferase, 4-(cytidine 5'-diphospho)-2-C-methyl-D-erythritol kinase, 4-hydroxybutanoyl-CoA dehydratase, N-acetylglucosaminyl-proteoglycan 4-beta-glucuronosyltransferase, Flavonol-3-O-triglucoside O-coumaroyltransferase, GalNAc-alpha-(1-4)-GalNAc-alpha-(1-3)-diNAcBac-PP-undecaprenol alpha-1,4-N-acetyl-D-galactosaminyltransferase, 4-hydroxymuconic-semialdehyde dehydrogenase, 2-dehydropantoate aldolase, 3-methyl-2-oxobutanoate dehydrogenase, Olympus Zuiko Digital ED 12-60mm f/2.8-4 SWD, D-4-hydroxyphenylglycine transaminase, Galactoside 2-alpha-L-fucosyltransferase, 2-methylisocitrate dehydratase, N-benzoyl-4-hydroxyanthranilate 4-O-methyltransferase, Oligosaccharide 4-alpha-D-glucosyltransferase, 4-Hydroxycoumarin synthase, 2-iminoacetate synthase

1 − 2 + 3 − 4 + ⋯, 1/2 − 1/4 + 1/8 − 1/16 + ⋯, 1 + 2 + 3 + 4 + ⋯, 4.3.2.1., 1/2 + 1/4 + 1/8 + 1/16 + ⋯, 1 − 2 + 4 − 8 + ⋯, 1 + 2 + 4 + 8 + ⋯, 4, 3, 2, 1, GlcA-beta-(1-2)-D-Man-alpha-(1-3)-D-Glc-beta-(1-4)-D-Glc-alpha-1-diphospho-ditrans,octacis-undecaprenol 4-beta-mannosyltransferase, 4-(2-carboxyphenyl)-2-oxobut-3-enoate aldolase, 2-oxopent-4-enoate hydratase, 2-hydroxy-4-carboxymuconate semialdehyde hemiacetal dehydrogenase, Chrysler 1.8, 2.0 & 2.4 engine, 2-8-8-4, L-2-amino-4-chloropent-4-enoate dehydrochlorinase, 1-pyrroline-4-hydroxy-2-carboxylate deaminase, 2-Hydroxyacylsphingosine 1-beta-galactosyltransferase, 4-hydroxy-3-methylbut-2-en-1-yl diphosphate synthase, 4-hydroxy-4-methyl-2-oxoglutarate aldolase, 2-Amino-4-deoxychorismate synthase, D-Man-alpha-(1-3)-D-Glc-beta-(1-4)-D-Glc-alpha-1-diphosphoundecaprenol 2-beta-glucuronyltransferase, 4-alpha-D-((1-4)-alpha-D-glucano)trehalose trehalohydrolase, South African Class Experimental 1 4-6-2, 4-hydroxy-2-oxoglutarate aldolase, Beta-D-galactosyl-(1-4)-L-rhamnose phosphorylase, 2-Amino-4-deoxychorismate dehydrogenase, 1-phosphatidylinositol 4-kinase, Scyllo-inosamine-4-phosphate amidinotransferase, 2-4-0, 3-hydroxy-2-methylpyridine-4,5-dicarboxylate 4-decarboxylase, Exo-(1-4)-α-D-glucan lyase, 2-4-4-0, 4-Hydroxy-3-methylbut-2-enyl diphosphate reductase, Chalcone 4'-O-glucosyltransferase, Lactosylceramide 4-alpha-galactosyltransferase, 4-oxalocrotonate decarboxylase, Jaguar Mark 1, 4-APBT, 2,5-Dimethoxy-4-sec-butylamphetamine, 4-oxalmesaconate hydratase, 2-chloro-4-carboxymethylenebut-2-en-1,4-olide isomerase, 4-hydroxy-2-oxovalerate aldolase, 1-(3-Chlorophenyl)-4-(2-phenylethyl)piperazine, 4-trimethylammoniobutyraldehyde dehydrogenase, Flavonoid 4'-O-methyltransferase, 4-phosphoerythronate dehydrogenase, 2-hydroxychromene-2-carboxylate isomerase, 4-carboxymuconolactone decarboxylase, 4-8-2, 4,5:9,10-diseco-3-hydroxy-5,9,17-trioxoandrosta-1(10),2-diene-4-oate hydrolase, 4-hydroxyphenylacetaldehyde dehydrogenase, 5-dehydro-4-deoxyglucarate dehydratase, SJK(C) Chung Hua Batu 4 1/2, 4-formylbenzenesulfonate dehydrogenase, Cycling at the 2008 Summer Paralympics – Women's individual pursuit (LC 1–2/CP 4), UDP-2-acetamido-4-amino-2,4,6-trideoxyglucose transaminase, 4-alpha-glucanotransferase, 2-hydroxyhexa-2,4-dienoate hydratase, Octopamine dehydratase, 2,1-fructan:2,1-fructan 1-fructosyltransferase, 5-guanidino-2-oxopentanoate decarboxylase, UDP-4-amino-4-deoxy-L-arabinose formyltransferase, Dermatan 4-sulfotransferase, Rhizobium leguminosarum exopolysaccharide glucosyl ketal-pyruvate-transferase, 4-6-2, Beta-apo-4'-carotenal oxygenase, Quinoline-4-carboxylate 2-oxidoreductase, 4-hydroxyglutamate transaminase, Pyrrole-2-carboxylate decarboxylase, 4-Dimethylallyltryptophan N-methyltransferase, 1-phosphatidylinositol-4-phosphate 5-kinase, 2-Hydroxy-4-methylbenzaldehyde, 4-nitrophenol 2-monooxygenase, (+)-Caryolan-1-ol synthase, Dolichyl-P-Man:Man6GlcNAc2-PP-dolichol alpha-1,2-mannosyltransferase, 4-(cytidine 5'-diphospho)-2-C-methyl-D-erythritol kinase, 4-hydroxybutanoyl-CoA dehydratase, N-acetylglucosaminyl-proteoglycan 4-beta-glucuronosyltransferase, Flavonol-3-O-triglucoside O-coumaroyltransferase, GalNAc-alpha-(1-4)-GalNAc-alpha-(1-3)-diNAcBac-PP-undecaprenol alpha-1,4-N-acetyl-D-galactosaminyltransferase, 4-hydroxymuconic-semialdehyde dehydrogenase, 2-dehydropantoate aldolase, 3-methyl-2-oxobutanoate dehydrogenase, Olympus Zuiko Digital ED 12-60mm f/2.8-4 SWD, D-4-hydroxyphenylglycine transaminase, Galactoside 2-alpha-L-fucosyltransferase, 2-methylisocitrate dehydratase, N-benzoyl-4-hydroxyanthranilate 4-O-methyltransferase, Oligosaccharide 4-alpha-D-glucosyltransferase, 4-Hydroxycoumarin synthase, 2-iminoacetate synthase, Inositol 4-methyltransferase, UDP-4-amino-4-deoxy-L-arabinose aminotransferase, Isohexenylglutaconyl-CoA hydratase, Scyllo-inosamine 4-kinase, 4-hydroxyproline epimerase, Polygalacturonate 4-alpha-galacturonosyltransferase, Peptidyl-glutamate 4-carboxylase, Erythrose-4-phosphate dehydrogenase, 4-hydroxybenzoate 4-O-beta-D-glucosyltransferase, SARS-CoV-2 Omicron variant, 2-Deoxystreptamine glucosyltransferase, N-acetylneuraminylgalactosylglucosylceramide b-1,4-N-acetylgalactosaminyltransferase, 5-4-3-2-1, 1, 2, 3, 4 (Plain White T's song), Luteolin-7-O-diglucuronide 4'-O-glucuronosyltransferase, Isoflavone 4'-O-methyltransferase, 2-oxoglutarate decarboxylase, Glucosylceramide beta-1,4-galactosyltransferase, 1-phosphatidylinositol-5-phosphate 4-kinase, I'm Happy and I'm Singing and a 1, 2, 3, 4, 2-methylcitrate dehydratase (2-methyl-trans-aconitate forming), Alizarin 2-beta-glucosyltransferase, 2-8-4, Xanthan ketal pyruvate transferase, Glucomannan 4-beta-mannosyltransferase, Android Jelly Bean, Glucuronyl-galactosyl-proteoglycan 4-a-N-acetylglucosaminyltransferase, Glycolipid 2-alpha-mannosyltransferase, Hydroxycinnamate 4-beta-glucosyltransferase, Branched-chain-2-oxoacid decarboxylase, Dolichyl-P-Man:Man5GlcNAc2-PP-dolichol alpha-1,3-mannosyltransferase, GalNAc5-diNAcBac-PP-undecaprenol beta-1,3-glucosyltransferase, Globotriaosylceramide 3-beta-N-acetylgalactosaminyltransferase, Serine 2-dehydrogenase, Diaminobutyrate—2-oxoglutarate transaminase, Starch synthase (maltosyl-transferring), Maltose synthase, (R)-2-methylmalate dehydratase, Mycodextranase, Gellan lyase, 3-Galactosyl-N-acetylglucosaminide 4-alpha-L-fucosyltransferase, 2-methylcitrate dehydratase, 2,7,4'-Trihydroxyisoflavanone 4'-O-methyltransferase, Mandelate 4-monooxygenase, Sphinganine-1-phosphate aldolase, 3-hydroxy-2-methylquinolin-4-one 2,4-dioxygenase, 4-hydroxybenzoate polyprenyltransferase, Glycoprotein 6-alpha-L-fucosyltransferase, 3,7-dimethylquercetin 4'-O-methyltransferase, 4-hydroxybenzoyl-CoA thioesterase, Lotus 1-2-3, 2010 Winter Paralympics cross-country skiing men's 1 × 4 km and 2 × 5 km Relay, Glucuronosyl-N-acetylglucosaminyl-proteoglycan 4-alpha-N-acetylglucosaminyltransferase, 6G-fructosyltransferase, 4-aminobutyrate transaminase, Glycoprotein 3-alpha-L-fucosyltransferase, 1, 2, 3, 4 (Sumpin' New), IOS 4, (R)-4-hydroxyphenyllactate dehydrogenase, Trans-o-hydroxybenzylidenepyruvate hydratase-aldolase