A358307 Main diagonal of array in A358304, divided by 2.
0, 1, 5, 16, 33, 67, 102, 171, 241, 346, 452, 627, 769, 1015, 1228, 1512, 1796, 2220, 2541, 3072, 3500, 4070, 4605, 5386, 5958, 6848, 7598, 8561, 9419, 10665, 11525, 12950, 14094, 15524, 16812, 18528, 19818, 21852, 23463, 25467, 27187, 29687, 31409, 34160, 36310, 38890, 41255, 44544, 46840, 50347, 53037, 56477, 59489
Offset: 0