O.g.f.: Sum_{n>=0} 2*n^n * (3*n+2)^(n-1) * exp(-n*(3*n+2)*x) * x^n / n!.
A217912
O.g.f.: Sum_{n>=0} 2*n^n * (3*n+2)^(n-1) * exp(-n*(3*n+2)*x) * x^n / n!.
Terms
- a(0) =1a(1) =2a(2) =22a(3) =602a(4) =26656a(5) =1643054a(6) =130318966a(7) =12666846728
External references
- oeis: A217912