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

Terms

a(0) =1a(1) =20a(2) =91a(3) =340a(4) =660a(5) =1836a(6) =2485a(7) =5560a(8) =7536a(9) =13280a(10) =14927a(11) =31360a(12) =29016a(13) =49924a(14) =60390a(15) =89776a(16) =84490a(17) =152496a(18) =131651a(19) =226520a(20) =227066a(21) =299420a(22) =282141a(23) =514080a(24) =415425a(25) =581776a(26) =614070a(27) =850864a(28) =711776a(29) =1226520