Expansion of Sum_{k>0} (1/(1+x^k)^4 - 1).

Terms

a(0) =-4a(1) =6a(2) =-24a(3) =41a(4) =-60a(5) =70a(6) =-124a(7) =206a(8) =-244a(9) =236a(10) =-368a(11) =560a(12) =-564a(13) =566a(14) =-896a(15) =1175a(16) =-1144a(17) =1180a(18) =-1544a(19) =2042a(20) =-2168a(21) =1942a(22) =-2604a(23) =3650a(24) =-3336a(25) =3100a(26) =-4304a(27) =5096a(28) =-4964a(29) =4940