a(n) = n! * Sum_{k=0..n} binomial(n+(n-1)*(k+1),n-k)/k!.
A361617
a(n) = n! * Sum_{k=0..n} binomial(n+(n-1)*(k+1),n-k)/k!.
Terms
- a(0) =1a(1) =2a(2) =15a(3) =214a(4) =4721a(5) =146046a(6) =5958367a(7) =307382090a(8) =19459587009
External references
- oeis: A361617