G.f. satisfies: A(x) = x + 4*x^2 + x*A(A(A(A(A(x))))).
A215118
G.f. satisfies: A(x) = x + 4*x^2 + x*A(A(A(A(A(x))))).
Terms
- a(0) =1a(1) =5a(2) =25a(3) =625a(4) =18125a(5) =628125a(6) =25390625a(7) =1158515625a(8) =58308203125
External references
- oeis: A215118