A372070 Triangular numbers that are 2 mod 4.

6, 10, 66, 78, 190, 210, 378, 406, 630, 666, 946, 990, 1326, 1378, 1770, 1830, 2278, 2346, 2850, 2926, 3486, 3570, 4186, 4278, 4950, 5050, 5778, 5886, 6670, 6786, 7626, 7750, 8646, 8778, 9730, 9870, 10878, 11026, 12090, 12246, 13366, 13530, 14706, 14878, 16110, 16290, 17578, 17766, 19110

Offset: 1

Author

N. J. A. Sloane, May 25 2024

Keywords

• nonn

Crossrefs

Cf. A000217.