a(n) = (n^2)*a(n-1) + a(n-2).

A133471

a(n) = (n^2)*a(n-1) + a(n-2).

Terms

    a(0) =0a(1) =1a(2) =4a(3) =37a(4) =596a(5) =14937a(6) =538328a(7) =26393009a(8) =1689690904a(9) =136891356233

External references