A024605 Number in position n when the numbers i^2 - i*j + j^2 (1 <= i <= j) are arranged in nondecreasing order.

1, 3, 4, 7, 7, 9, 12, 13, 13, 16, 19, 19, 21, 21, 25, 27, 28, 28, 31, 31, 36, 37, 37, 39, 39, 43, 43, 48, 49, 49, 49, 52, 52, 57, 57, 61, 61, 63, 63, 64, 67, 67, 73, 73, 75, 76, 76, 79, 79, 81, 84, 84, 91, 91, 91, 91, 93, 93, 97, 97, 100, 103, 103, 108, 109, 109, 111, 111, 112, 112, 117, 117