Formula Carbons

methane has 1 carbon

ethane has 2 carbons

propane has 3 carbons

butane has 4 carbons

pentane has 5 carbons

hexane has 6 carbons

heptane has 7 carbons

octane has 8 carbons

nonane has 9 carbons

decane has 10 carbons

undecane has 11 carbons

dodecane has 12 carbons

tridecane has 13 carbons

tetradecane has 14 carbons

pentadecane has 15 carbons

hexadecane has 16 carbons

heptadecane has 17 carbons

octadecane has 18 carbons

nonadecane has 19 carbons

eicosane has 20 carbons

triacontane has 30 carbons