Expansion of g.f. c(3x)^2, where c(x) is the g.f. of A000108.
A101600
Expansion of g.f. c(3x)^2, where c(x) is the g.f. of A000108.
Terms
- a(0) =1a(1) =6a(2) =45a(3) =378a(4) =3402a(5) =32076a(6) =312741a(7) =3127410a(8) =31899582a(9) =330595668a(10) =3471254514a(11) =36848701764a(12) =394807518900
External references
- oeis: A101600