Number of different coefficient values in expansion of Product_{k=1..n} (1+x^(k^2)).

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =2a(5) =3a(6) =3a(7) =4a(8) =6a(9) =7a(10) =10a(11) =15a(12) =21a(13) =33a(14) =50a(15) =83a(16) =126a(17) =208a(18) =321a(19) =498a(20) =688a(21) =934a(22) =1208a(23) =1496a(24) =1798a(25) =2140a(26) =2482a(27) =2862a(28) =3268a(29) =3690