Expansion of Product_{k>=1} (1 + (k - 1)!*x^k).

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =8a(5) =32a(6) =152a(7) =882a(8) =5964a(9) =46644a(10) =411564a(11) =4056912a(12) =44097072a(13) =524234448a(14) =6761911968a(15) =94055452128