E.g.f.: exp(5*x*G(x)^4) / G(x)^4 where G(x) = 1 + x*G(x)^5 is the g.f. of A002294.

A251575

E.g.f.: exp(5*x*G(x)^4) / G(x)^4 where G(x) = 1 + x*G(x)^5 is the g.f. of A002294.

Terms

    a(0) =1a(1) =1a(2) =5a(3) =65a(4) =1505a(5) =51505a(6) =2354725a(7) =135258625a(8) =9373203425a(9) =761486105825

External references