G.f. satisfies A(A(A(x))) = F(x), where F(x) is the g.f. for A053540(n) = n*9^(n-1).

A372499

G.f. satisfies A(A(A(x))) = F(x), where F(x) is the g.f. for A053540(n) = n*9^(n-1).

Terms

    a(0) =0a(1) =1a(2) =6a(3) =9a(4) =54a(5) =0a(6) =-1944a(7) =44469a(8) =-323676a(9) =-5990193a(10) =179194032a(11) =484654509a(12) =-105337511100a(13) =757846026261

External references