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

Terms

a(0) =1a(1) =3a(2) =10a(3) =25a(4) =62a(5) =136a(6) =293a(7) =590a(8) =1165a(9) =2205a(10) =4097a(11) =7391a(12) =13120a(13) =22780a(14) =38997a(15) =65613a(16) =109036a(17) =178660a(18) =289575a(19) =463842a(20) =735870a(21) =1155717a(22) =1799620a(23) =2777795a(24) =4254859a(25) =6467115a(26) =9761770a(27) =14633605a(28) =21799465a(29) =32273399