Squares that are not the sum of 2 nonzero squares.

Terms

a(0) =1a(1) =4a(2) =9a(3) =16a(4) =36a(5) =49a(6) =64a(7) =81a(8) =121a(9) =144a(10) =196a(11) =256a(12) =324a(13) =361a(14) =441a(15) =484a(16) =529a(17) =576a(18) =729a(19) =784a(20) =961a(21) =1024a(22) =1089a(23) =1296a(24) =1444a(25) =1764a(26) =1849a(27) =1936a(28) =2116a(29) =2209