A000602 / hydrocarbons

[AlexDaniel]

A000602 / Number of n-node unrooted quartic trees; number of n-carbon alkanes C(n)H(2n+2) ignoring stereoisomers.

The sequence is not implemented yet.

1 1 1 1 2 3 5 9 18 35 75 159 355 802 1858 4347 10359 24894 60523 148284 366319 910726 2278658 5731580 14490245 36797588 93839412 240215803 617105614 1590507121 4111846763 10660307791 27711253769

[thundergnat]

http://rosettacode.org/wiki/Paraffins#Perl_6 is an implementation but would need to be made lazy