A036724 G.f. satisfies A(x) = 1 + x*cycle_index(G,A(x)) where G = cyclic group of order 2 generated by (1,2)(3,4)(5,6).

1, 1, 3, 18, 109, 768, 5652, 43618, 346353, 2816526, 23321925, 196005552, 1667527836, 14333190427, 124283998707, 1085847441828, 9549523972105, 84471264138366, 751042470499425, 6708237169875867, 60164133936171522

Offset

0,3

Links

Table of n, a(n) for n=0..20.

Crossrefs

Cf. A036717-A036723.

Sequence in context: A050623 A037760 A037648 * A037767 A037655 A074571

Adjacent sequences: A036721 A036722 A036723 * A036725 A036726 A036727

Keyword

nonn

Author

N. J. A. Sloane.

Status

approved