Expansion of Product_{k>=1} (1 + x^(k^2)) * (1 + x^k).

Terms

a(0) =1a(1) =2a(2) =2a(3) =3a(4) =5a(5) =7a(6) =9a(7) =12a(8) =15a(9) =20a(10) =27a(11) =33a(12) =41a(13) =52a(14) =65a(15) =80a(16) =99a(17) =120a(18) =145a(19) =177a(20) =213a(21) =255a(22) =305a(23) =363a(24) =430a(25) =511a(26) =604a(27) =709a(28) =833a(29) =976