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

Terms

a(0) =1a(1) =-1a(2) =9a(3) =-12a(4) =20a(5) =-12a(6) =35a(7) =-60a(8) =72a(9) =-30a(10) =77a(11) =-132a(12) =104a(13) =-56a(14) =210a(15) =-256a(16) =170a(17) =-117a(18) =209a(19) =-320a(20) =378a(21) =-132a(22) =299a(23) =-672a(24) =425a(25) =-182a(26) =594a(27) =-588a(28) =464a(29) =-360