G.f. A(x) satisfies A(x) = 1 + x + x*(1 + x)^3*A(x)^3.
A366240
G.f. A(x) satisfies A(x) = 1 + x + x*(1 + x)^3*A(x)^3.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =60a(4) =432a(5) =3378a(6) =27792a(7) =237122a(8) =2079132a(9) =18620709a(10) =169614960a(11) =1566540573a(12) =14635978998a(13) =138080055192
External references
- oeis: A366240