G.f. A(x) satisfies: A(x)^2 = x^2 + x^2*A(x + A(x)).
A391521
G.f. A(x) satisfies: A(x)^2 = x^2 + x^2*A(x + A(x)).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =9a(4) =82a(5) =1447a(6) =49360a(7) =3285360a(8) =430454058a(9) =111704560283
External references
- oeis: A391521