A034024 Imprimitively but not primitively represented by x^2+y^2.
4, 8, 9, 16, 18, 20, 32, 36, 40, 45, 49, 52, 64, 68, 72, 80, 81, 90, 98, 100, 104, 116, 117, 121, 128, 136, 144, 148, 153, 160, 162, 164, 180, 196, 200, 208, 212, 225, 232, 234, 242, 244, 245, 256, 260, 261, 272, 288, 292, 296, 306, 320, 324, 328
Offset: 0