O.g.f.: Sum_{n>=0} n^(2*n) * x^n / Product_{k=1..n} (1 - n^2*k*x).
A229261
O.g.f.: Sum_{n>=0} n^(2*n) * x^n / Product_{k=1..n} (1 - n^2*k*x).
Terms
- a(0) =1a(1) =1a(2) =17a(3) =922a(4) =106695a(5) =21742971a(6) =6977367418
External references
- oeis: A229261