A085076 Triangular numbers with a prime signature that has not occurred earlier.

1, 3, 6, 28, 36, 66, 120, 136, 210, 276, 300, 496, 528, 630, 1176, 2016, 2080, 3240, 3570, 4560, 4950, 5460, 6216, 8128, 8256, 9180, 25200, 29403, 32640, 32896, 37128, 39060, 41328, 41616, 51040, 61776, 64980, 73920, 79800, 93096, 97020, 103740