a(n) is the coefficient of x^n in the (n+2)-th self-composition of g.f. A(x) for n>=1, with a(1)=1.
A153849
a(n) is the coefficient of x^n in the (n+2)-th self-composition of g.f. A(x) for n>=1, with a(1)=1.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =40a(4) =675a(5) =16023a(6) =488264a(7) =18150408a(8) =798091737a(9) =40691618165
External references
- oeis: A153849