Expansion of 1/(Sum_{k>=0} x^(k^3))^2.

Terms

a(0) =1a(1) =-2a(2) =3a(3) =-4a(4) =5a(5) =-6a(6) =7a(7) =-8a(8) =7a(9) =-4a(10) =-1a(11) =8a(12) =-17a(13) =28a(14) =-41a(15) =56a(16) =-70a(17) =80a(18) =-83a(19) =76a(20) =-56a(21) =20a(22) =35a(23) =-112a(24) =210a(25) =-324a(26) =445a(27) =-562a(28) =658a(29) =-712