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

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =18a(5) =40a(6) =88a(7) =192a(8) =420a(9) =922a(10) =2024a(11) =4440a(12) =9736a(13) =21352a(14) =46832a(15) =102720a(16) =225298a(17) =494144a(18) =1083804a(19) =2377112a(20) =5213736a(21) =11435312a(22) =25081112a(23) =55010496a(24) =120654744a(25) =264632554a(26) =580419672a(27) =1273036832a(28) =2792156864a(29) =6124049048