O.g.f.: 1 / Sum_{n>=0} -n^n*(n-1)^(n-1) * exp(-n*(n-1)*x) * x^n / n!.
A217906
O.g.f.: 1 / Sum_{n>=0} -n^n*(n-1)^(n-1) * exp(-n*(n-1)*x) * x^n / n!.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =19a(4) =223a(5) =4019a(6) =98071a(7) =3012595a(8) =111408735a(9) =4813926235a(10) =237893755847
External references
- oeis: A217906