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

Terms

a(0) =0a(1) =1a(2) =-3a(3) =7a(4) =-10a(5) =13a(6) =-21a(7) =35a(8) =-39a(9) =36a(10) =-55a(11) =85a(12) =-78a(13) =71a(14) =-118a(15) =155a(16) =-136a(17) =130a(18) =-171a(19) =232a(20) =-234a(21) =177a(22) =-253a(23) =389a(24) =-310a(25) =248a(26) =-390a(27) =455a(28) =-406a(29) =378