Expansion of (-1 + Product_{k>=1} 1 / (1 + (-x)^k))^9.

Terms

a(0) =1a(1) =0a(2) =9a(3) =9a(4) =45a(5) =81a(6) =201a(7) =414a(8) =828a(9) =1650a(10) =3060a(11) =5697a(12) =10131a(13) =17829a(14) =30564a(15) =51543a(16) =85482a(17) =139455a(18) =224527a(19) =356436a(20) =559341a(21) =867405a(22) =1331208a(23) =2022525a(24) =3044331a(25) =4542174a(26) =6720705a(27) =9866794a(28) =14377941a(29) =20804994