G.f. A(x) satisfies A(x) = B(x*A(x)) / (1 - x)^3, where B(x) is the g.f. of A002293.

A381947

G.f. A(x) satisfies A(x) = B(x*A(x)) / (1 - x)^3, where B(x) is the g.f. of A002293.

Terms

    a(0) =1a(1) =4a(2) =17a(3) =111a(4) =1001a(5) =10507a(6) =118986a(7) =1411789a(8) =17307078a(9) =217422098a(10) =2784080234a(11) =36201950786a(12) =476725871599

External references