Expansion of Product_{k>=1} (1 - x^k)^18.

Terms

a(0) =1a(1) =-18a(2) =135a(3) =-510a(4) =765a(5) =1242a(6) =-7038a(7) =8280a(8) =9180a(9) =-27710a(10) =3519a(11) =20196a(12) =50370a(13) =-68850a(14) =-153765a(15) =244782a(16) =52785a(17) =-71010a(18) =-130525a(19) =-343620a(20) =517293a(21) =54978a(22) =498780a(23) =-390150a(24) =-1835865a(25) =1161270a(26) =896751a(27) =793730a(28) =-633420