A097270 Numbers that are the difference of two nonzero squares but not the sum of two nonzero squares.

3, 7, 9, 11, 12, 15, 16, 19, 21, 23, 24, 27, 28, 31, 33, 35, 36, 39, 43, 44, 47, 48, 49, 51, 55, 56, 57, 59, 60, 63, 64, 67, 69, 71, 75, 76, 77, 79, 81, 83, 84, 87, 88, 91, 92, 93, 95, 96, 99, 103, 105, 107, 108, 111, 112, 115, 119, 120, 121, 123, 124, 127, 129, 131, 132

Offset: 1

Author

Ray Chandler, Aug 19 2004

Keywords

• nonn

Comments

Intersection of A024352 (difference of squares) and complement of A000404 (sum of squares).

Links

• Eric Weisstein's World of Mathematics, Sum of Squares Function.

Crossrefs

Cf. A000404, A024352, A097268-A097271.