G.f. A(x) satisfies A(x) = 1 + x * A(x)^3 * (1 + 2 * A(x)).
A336539
G.f. A(x) satisfies A(x) = 1 + x * A(x)^3 * (1 + 2 * A(x)).
Terms
- a(0) =1a(1) =3a(2) =33a(3) =498a(4) =8691a(5) =164937a(6) =3305868a(7) =68855862a(8) =1475636055a(9) =32327521077a(10) =720713175441
External references
- oeis: A336539