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

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =5a(6) =7a(7) =9a(8) =12a(9) =16a(10) =21a(11) =27a(12) =35a(13) =44a(14) =55a(15) =69a(16) =85a(17) =104a(18) =127a(19) =154a(20) =186a(21) =224a(22) =268a(23) =320a(24) =381a(25) =452a(26) =534a(27) =630a(28) =741a(29) =869