O.g.f.: Sum_{n>=0} n^n * (3*n+1)^(n-1) * exp(-n*(3*n+1)*x) * x^n / n!.
A217911
O.g.f.: Sum_{n>=0} n^n * (3*n+1)^(n-1) * exp(-n*(3*n+1)*x) * x^n / n!.
Terms
- a(0) =1a(1) =1a(2) =10a(3) =262a(4) =11296a(5) =684172a(6) =53598952a(7) =5162269744a(8) =590636585728
External references
- oeis: A217911