Expansion of (Product_{j>=1} (1-(-x)^j) - 1)^7 in powers of x.

Terms

a(0) =1a(1) =-7a(2) =21a(3) =-35a(4) =28a(5) =21a(6) =-105a(7) =181a(8) =-189a(9) =77a(10) =140a(11) =-385a(12) =546a(13) =-511a(14) =252a(15) =203a(16) =-693a(17) =1029a(18) =-1092a(19) =798a(20) =-203a(21) =-581a(22) =1281a(23) =-1708a(24) =1687a(25) =-1232a(26) =413a(27) =602a(28) =-1485a(29) =2233