E.g.f.: Product_{k>=1} (1 + x^k)^exp(-x).

Terms

a(0) =1a(1) =1a(2) =0a(3) =6a(4) =6a(5) =75a(6) =1025a(7) =1225a(8) =43988a(9) =471345a(10) =5084387a(11) =40870181a(12) =866782774a(13) =8473297261a(14) =165871287465