Expansion of Product_{k>=0} ((1+x^(4*k+1))/(1-x^(4*k+1)))^2.

Terms

a(0) =1a(1) =4a(2) =8a(3) =12a(4) =16a(5) =24a(6) =40a(7) =60a(8) =80a(9) =104a(10) =144a(11) =204a(12) =272a(13) =344a(14) =440a(15) =584a(16) =768a(17) =968a(18) =1200a(19) =1516a(20) =1936a(21) =2424a(22) =2968a(23) =3644a(24) =4528a(25) =5596a(26) =6800a(27) =8216a(28) =10000a(29) =12184