G.f. satisfies: A(x) = (1 + x*A(x)^3) * (1 + x^2*A(x)^2).
A200717
G.f. satisfies: A(x) = (1 + x*A(x)^3) * (1 + x^2*A(x)^2).
Terms
- a(0) =1a(1) =1a(2) =4a(3) =18a(4) =93a(5) =521a(6) =3073a(7) =18806a(8) =118297a(9) =760162a(10) =4968480a(11) =32928392a(12) =220766739a(13) =1494635330a(14) =10203884795a(15) =70167751762a(16) =485574854049
External references
- oeis: A200717