E.g.f.: exp(8*x*G(x)^7) / G(x) where G(x) = 1 + x*G(x)^8 is the g.f. of A007556.

A251668

E.g.f.: exp(8*x*G(x)^7) / G(x) where G(x) = 1 + x*G(x)^8 is the g.f. of A007556.

Terms

    a(0) =1a(1) =7a(2) =146a(3) =5570a(4) =316376a(5) =24070168a(6) =2303562256a(7) =266121810928

External references