Expansion of (-1 + Product_{k>=1} 1 / (1 + (-x)^k))^5.

Terms

a(0) =1a(1) =0a(2) =5a(3) =5a(4) =15a(5) =25a(6) =45a(7) =80a(8) =125a(9) =210a(10) =321a(11) =500a(12) =745a(13) =1110a(14) =1620a(15) =2326a(16) =3315a(17) =4660a(18) =6500a(19) =8955a(20) =12261a(21) =16640a(22) =22425a(23) =29990a(24) =39870a(25) =52701a(26) =69230a(27) =90460a(28) =117620a(29) =152225