a(0) = 0, a(1) = 1, a(n+1) = (2*n^2+2*n+21)*a(n) - n^4*a(n-1).
A142998
a(0) = 0, a(1) = 1, a(n+1) = (2*n^2+2*n+21)*a(n) - n^4*a(n-1).
Terms
- a(0) =0a(1) =1a(2) =25a(3) =809a(4) =34380a(5) =1890076a(6) =131608656a(7) =11369370384
External references
- oeis: A142998