G.f. A(x) satisfies A(x) = (1 + x*A(x)^3) * C(x), where C(x) is the g.f. of A000108.
A381782
G.f. A(x) satisfies A(x) = (1 + x*A(x)^3) * C(x), where C(x) is the g.f. of A000108.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =52a(4) =342a(5) =2437a(6) =18331a(7) =143320a(8) =1153308a(9) =9489487a(10) =79470647a(11) =675149665a(12) =5804359859a(13) =50402807459a(14) =441433999816
External references
- oeis: A381782