A044402 Numbers n such that string 7,0 occurs in the base 10 representation of n but not of n-1.

70, 170, 270, 370, 470, 570, 670, 700, 770, 870, 970, 1070, 1170, 1270, 1370, 1470, 1570, 1670, 1700, 1770, 1870, 1970, 2070, 2170, 2270, 2370, 2470, 2570, 2670, 2700, 2770, 2870, 2970, 3070, 3170, 3270, 3370, 3470, 3570