Number of non-cyclic hydrocarbons with n carbon atoms (excluding stereoisomers).

A002986

Number of non-cyclic hydrocarbons with n carbon atoms (excluding stereoisomers).

Terms

    a(0) =1a(1) =3a(2) =4a(3) =12a(4) =27a(5) =84a(6) =247a(7) =826a(8) =2777a(9) =9868a(10) =35579a(11) =131847a(12) =495671a(13) =1893819a(14) =7320954a(15) =28619581a(16) =112923053a(17) =449343946a(18) =1801330288a(19) =7269849395a(20) =29517342098a(21) =120507480668a(22) =494449558111

External references