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

Terms

a(0) =1a(1) =3a(2) =9a(3) =24a(4) =60a(5) =141a(6) =324a(7) =717a(8) =1560a(9) =3330a(10) =7020a(11) =14622a(12) =30225a(13) =61998a(14) =126522a(15) =257007a(16) =520326a(17) =1050396a(18) =2116116a(19) =4255584a(20) =8547330a(21) =17149350a(22) =34382295a(23) =68889840a(24) =137969466a(25) =276220962a(26) =552865365a(27) =1106356314a(28) =2213644548a(29) =4428657402