A049254 - OEIS

A049254

Smallest nonnegative value taken on by 15x^2 - ny^2 for an infinite number of integer pairs (x, y).

6, 7, 3, 11, 10, 6, 8, 7, 6, 5, 1, 3, 2, 1, 0, 15, 15, 15, 15, 15, 15, 15, 7, 15, 15, 6, 15, 15, 10, 15, 11, 7, 3, 15, 15, 15, 2, 10, 15, 15, 6, 15, 15, 4, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 15, 15, 6, 15, 15, 15, 15, 15, 15