A044311 Numbers n such that string 6,6 occurs in the base 9 representation of n but not of n-1.

60, 141, 222, 303, 384, 465, 540, 627, 708, 789, 870, 951, 1032, 1113, 1194, 1269, 1356, 1437, 1518, 1599, 1680, 1761, 1842, 1923, 1998, 2085, 2166, 2247, 2328, 2409, 2490, 2571, 2652, 2727, 2814, 2895, 2976, 3057, 3138