Expansion of (-1 + Product_{k>=1} 1 / (1 + (-x)^k))^7.

Terms

a(0) =1a(1) =0a(2) =7a(3) =7a(4) =28a(5) =49a(6) =105a(7) =203a(8) =364a(9) =672a(10) =1141a(11) =1960a(12) =3220a(13) =5250a(14) =8359a(15) =13104a(16) =20272a(17) =30877a(18) =46522a(19) =69195a(20) =101941a(21) =148604a(22) =214697a(23) =307475a(24) =436849a(25) =615965a(26) =862246a(27) =1199009a(28) =1656642a(29) =2275231