A044349 Numbers n such that string 1,7 occurs in the base 10 representation of n but not of n-1.

17, 117, 170, 217, 317, 417, 517, 617, 717, 817, 917, 1017, 1117, 1170, 1217, 1317, 1417, 1517, 1617, 1700, 1817, 1917, 2017, 2117, 2170, 2217, 2317, 2417, 2517, 2617, 2717, 2817, 2917, 3017, 3117, 3170, 3217, 3317, 3417