Coefficient of x^n in (Product_{m=1..n}(1-x^m))^n.

Terms

a(0) =1a(1) =-1a(2) =-1a(3) =5a(4) =-5a(5) =-6a(6) =11a(7) =41a(8) =-125a(9) =-85a(10) =1054a(11) =-2069a(12) =-209a(13) =8605a(14) =-15625a(15) =3990a(16) =14035a(17) =36685a(18) =-130525a(19) =-254525a(20) =1899830a(21) =-3603805a(22) =-134905a(23) =13479425a(24) =-25499225a(25) =23579969a(26) =-64447293a(27) =237487433a(28) =-133867445a(29) =-1795846200