Expansion of Sum_{k>0} x^(4*k)/(1+x^k)^5.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =-5a(5) =15a(6) =-35a(7) =71a(8) =-126a(9) =205a(10) =-330a(11) =511a(12) =-715a(13) =966a(14) =-1370a(15) =1891a(16) =-2380a(17) =2949a(18) =-3876a(19) =5051a(20) =-6020a(21) =6985a(22) =-8855a(23) =11207a(24) =-12655a(25) =14235a(26) =-17676a(27) =21442a(28) =-23751a(29) =26260