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

Terms

a(0) =1a(1) =6a(2) =15a(3) =36a(4) =56a(5) =111a(6) =141a(7) =240a(8) =300a(9) =446a(10) =507a(11) =791a(12) =820a(13) =1161a(14) =1310a(15) =1736a(16) =1786a(17) =2505a(18) =2471a(19) =3346a(20) =3466a(21) =4307a(22) =4325a(23) =5895a(24) =5581a(25) =7026a(26) =7230a(27) =8905a(28) =8556a(29) =11246