G.f. satisfies: A(x) = Sum_{n>=0} A(x)^n * x^(n^2) * (1 - x^(2*n+1))/(1 - x).

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =8a(5) =17a(6) =37a(7) =82a(8) =184a(9) =417a(10) =954a(11) =2200a(12) =5109a(13) =11937a(14) =28040a(15) =66179a(16) =156857a(17) =373205a(18) =891034a(19) =2134072a(20) =5125944a(21) =12344835a(22) =29802478a(23) =72109852a(24) =174839832a(25) =424742526a(26) =1033697149a(27) =2519947080a(28) =6152807700a(29) =15045156972