G.f. A(x) satisfies A(A(A(A(A(A(x)))))) = Sum_{k>=1} k * 18^(k-1) * x^k.
A372522
G.f. A(x) satisfies A(A(A(A(A(A(x)))))) = Sum_{k>=1} k * 18^(k-1) * x^k.
Terms
- a(0) =0a(1) =1a(2) =6a(3) =-18a(4) =378a(5) =-5670a(6) =52488a(7) =930204a(8) =-55108026a(9) =575622774a(10) =46483766460
External references
- oeis: A372522