G.f. A(x) satisfies A(x) = (1 + x*A(x)*(1 + x*A(x))^3)^2.

A365131

G.f. A(x) satisfies A(x) = (1 + x*A(x)*(1 + x*A(x))^3)^2.

Terms

    a(0) =1a(1) =2a(2) =11a(3) =62a(4) =395a(5) =2662a(6) =18720a(7) =135738a(8) =1007607a(9) =7619456a(10) =58488028a(11) =454556544a(12) =3569655975a(13) =28282204680a(14) =225796917864

External references