0,2

For n >= 1 a(n) is the order of the wreath product of the symmetric group S_n and the abelian group (C_6)^n. - Ahmed Fares (ahmedfares(AT)my-deja.com), May 07 2001

INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 528

E.g.f. (1-6*x)^-1

Cf. A000142, A008542, A008543, A053103, A000165. a(n)= A051151(n+1, 0).

Adjacent sequences: A047055 A047056 A047057 this_sequence A047059 A047060 A047061

Sequence in context: A052678 A052719 A063965 this_sequence A001763 A003235 A113133

nonn,easy

Joe Keane (jgk(AT)jgk.org)