G.f. A(x) satisfies A(x) = 1/(1 - x/(1 - x*A(x)^4)^2).
A391650
G.f. A(x) satisfies A(x) = 1/(1 - x/(1 - x*A(x)^4)^2).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =16a(4) =97a(5) =643a(6) =4514a(7) =32975a(8) =248073a(9) =1908922a(10) =14954639a(11) =118872632a(12) =956360378a(13) =7772627864a(14) =63719954171a(15) =526297294068
External references
- oeis: A391650