E.g.f.: exp(-(x^5/5))/(1-x).

Terms

a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =96a(6) =576a(7) =4032a(8) =32256a(9) =290304a(10) =2975616a(11) =32731776a(12) =392781312a(13) =5106157056a(14) =71486198784