E.g.f.: -x^5*log(1-x).

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =720a(7) =2520a(8) =13440a(9) =90720a(10) =725760a(11) =6652800a(12) =68428800a(13) =778377600a(14) =9686476800a(15) =130767436800