G.f. satisfies A(x) = (1 + x*A(x)^2) * (1 + x*A(x)^4).

A215715

G.f. satisfies A(x) = (1 + x*A(x)^2) * (1 + x*A(x)^4).

Terms

    a(0) =1a(1) =2a(2) =13a(3) =118a(4) =1242a(5) =14227a(6) =172177a(7) =2165732a(8) =28032668a(9) =370944717a(10) =4995412647a(11) =68239105203a(12) =943278064473

External references