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

Terms

a(0) =1a(1) =0a(2) =1a(3) =2a(4) =3a(5) =6a(6) =8a(7) =16a(8) =20a(9) =42a(10) =51a(11) =92a(12) =132a(13) =204a(14) =299a(15) =476a(16) =644a(17) =978a(18) =1488a(19) =2024a(20) =3048a(21) =4318a(22) =6248a(23) =8596a(24) =12555a(25) =17378a(26) =24740a(27) =34310a(28) =47940a(29) =65842