A128815 Numbers n such that n-th and (n+2)th triangular numbers sum up to a prime.

1, 2, 4, 5, 7, 11, 13, 14, 16, 19, 20, 23, 26, 32, 37, 40, 49, 53, 56, 58, 61, 65, 68, 70, 74, 76, 77, 79, 88, 89, 98, 100, 104, 109, 110, 116, 118, 130, 137, 140, 142, 146, 149, 152, 154, 160, 161, 163, 166, 167, 172, 175, 187, 188, 191, 193, 202, 205, 208, 214, 217