G.f. A(x) satisfies A(x) = 1 + x * A(x)^4 * (1 + 2 * A(x)).
A336572
G.f. A(x) satisfies A(x) = 1 + x * A(x)^4 * (1 + 2 * A(x)).
Terms
- a(0) =1a(1) =3a(2) =42a(3) =822a(4) =18708a(5) =464115a(6) =12175368a(7) =332156784a(8) =9328004700a(9) =267870927324
External references
- oeis: A336572