E.g.f.: x^4*log(-1/(-1+x)).

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =120a(6) =360a(7) =1680a(8) =10080a(9) =72576a(10) =604800a(11) =5702400a(12) =59875200a(13) =691891200a(14) =8717829120a(15) =118879488000