G.f.: A(x) = exp( Sum_{n>=1} [Sum_{k=0..n} C(n,k)^n * A(x)^k] * x^n/n ).
A198946
G.f.: A(x) = exp( Sum_{n>=1} [Sum_{k=0..n} C(n,k)^n * A(x)^k] * x^n/n ).
Terms
- a(0) =1a(1) =2a(2) =7a(3) =43a(4) =661a(5) =45503a(6) =14835966a(7) =19030289368
External references
- oeis: A198946