Expansion of Product_{k>=1} (1-x^k)^27.

Terms

a(0) =1a(1) =-27a(2) =324a(3) =-2223a(4) =9126a(5) =-19278a(6) =-5967a(7) =159030a(8) =-399087a(9) =151593a(10) =1270971a(11) =-2500875a(12) =74970a(13) =4203522a(14) =-1004157a(15) =-4796037a(16) =-11750778a(17) =32885190a(18) =10452375a(19) =-77533092a(20) =27104868a(21) =43070625a(22) =63798840a(23) =-69960267a(24) =-215939061a(25) =236414349a(26) =-37046646a(27) =237487433a(28) =85921371