G.f. satisfies A(x) = 1 + x * A(x)^3 * (1 + A(x))^2.
A371661
G.f. satisfies A(x) = 1 + x * A(x)^3 * (1 + A(x))^2.
Terms
- a(0) =1a(1) =4a(2) =64a(3) =1424a(4) =36800a(5) =1036160a(6) =30843648a(7) =954671360a(8) =30415326208a(9) =990831196160
External references
- oeis: A371661