G.f. 1/(1-6*x*c(x)) where c(x) is the g.f. of A000108.
A127628
G.f. 1/(1-6*x*c(x)) where c(x) is the g.f. of A000108.
Terms
- a(0) =1a(1) =6a(2) =42a(3) =300a(4) =2154a(5) =15492a(6) =111492a(7) =802584a(8) =5778090a(9) =41600532a(10) =299517996a(11) =2156509416a(12) =15526797252a(13) =111792690600a(14) =804906480840
External references
- oeis: A127628