Expansion of Product_{n>=1} (1 - x^n)^7.

Terms

a(0) =1a(1) =-7a(2) =14a(3) =7a(4) =-49a(5) =21a(6) =35a(7) =41a(8) =-49a(9) =-133a(10) =98a(11) =-21a(12) =126a(13) =112a(14) =-176a(15) =-105a(16) =-126a(17) =140a(18) =-35a(19) =147a(20) =259a(21) =98a(22) =-420a(23) =-224a(24) =238a(25) =-455a(26) =273a(27) =-14a(28) =322a(29) =406