A044278 Numbers n such that string 3,0 occurs in the base 9 representation of n but not of n-1.

27, 108, 189, 243, 270, 351, 432, 513, 594, 675, 756, 837, 918, 972, 999, 1080, 1161, 1242, 1323, 1404, 1485, 1566, 1647, 1701, 1728, 1809, 1890, 1971, 2052, 2133, 2187, 2295, 2376, 2430, 2457, 2538, 2619, 2700, 2781, 2862