Expansion of b(2)*b(4)*b(6)/(1-x-x^2-x^4+x^6+x^8), where b(k) = (1-x^k)/(1-x).

Terms

a(0) =1a(1) =4a(2) =10a(3) =21a(4) =40a(5) =73a(6) =129a(7) =224a(8) =385a(9) =658a(10) =1122a(11) =1910a(12) =3248a(13) =5519a(14) =9375a(15) =15922a(16) =27038a(17) =45911a(18) =77954a(19) =132358a(20) =224727a(21) =381555a(22) =647823a(23) =1099903a(24) =1867461a(25) =3170650a(26) =5383253a(27) =9139893a(28) =15518057a(29) =26347142