G.f. satisfies: A(x) = x + A(A(x))^2 + A(A(x))^4.
A171991
G.f. satisfies: A(x) = x + A(A(x))^2 + A(A(x))^4.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =25a(4) =190a(5) =1644a(6) =15636a(7) =159977a(8) =1736392a(9) =19804646a(10) =235758596a(11) =2914539808a(12) =37275052828a(13) =491727695628
External references
- oeis: A171991