Arithmetic derivative of n!.

Terms

a(0) =0a(1) =0a(2) =1a(3) =5a(4) =44a(5) =244a(6) =2064a(7) =15168a(8) =181824a(9) =1878336a(10) =21323520a(11) =238187520a(12) =3496919040a(13) =45938949120a(14) =699188474880