A044650 Numbers n such that string 2,0 occurs in the base 9 representation of n but not of n+1.

18, 99, 170, 180, 261, 342, 423, 504, 585, 666, 747, 828, 899, 909, 990, 1071, 1152, 1233, 1314, 1395, 1538, 1557, 1628, 1638, 1719, 1800, 1881, 1962, 2043, 2124, 2205, 2286, 2357, 2367, 2448, 2529, 2610, 2691, 2772, 2853