a(n) = (n^1 + 1!)*(n^2 + 2!)*(n^3 + 3!)*(n^4 + 4!)/2!.

A131528

a(n) = (n^1 + 1!)*(n^2 + 2!)*(n^3 + 3!)*(n^4 + 4!)/2!.

Terms

    a(0) =144a(1) =525a(2) =5040a(3) =76230a(4) =882000a(5) =6886539a(6) =38974320a(7) =172650300a(8) =633845520a(9) =2008589625a(10) =5657204784a(11) =14470043490a(12) =34161950160a(13) =75378387735a(14) =156979350000a(15) =310979592504a(16) =589757174160

External references