Expansion of 1 + Sum_{k>0} x^k^2/((1-x)(1-x^2)...(1-x^(2k))).

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =4a(6) =5a(7) =7a(8) =9a(9) =12a(10) =15a(11) =19a(12) =24a(13) =30a(14) =37a(15) =46a(16) =57a(17) =69a(18) =84a(19) =102a(20) =123a(21) =148a(22) =177a(23) =211a(24) =252a(25) =299a(26) =353a(27) =417a(28) =491a(29) =576