A033705 Fancy primitive repdigit polygonal numbers (with multiplicity).

6, 9, 22, 55, 66, 88, 111, 111, 222, 333, 444, 555, 666, 777, 888, 6666, 44444, 111111, 111111, 777777, 999999, 111111111, 777777777, 9999999999, 333333333333, 555555555555, 555555555555, 1111111111111, 1111111111111