A044403 Numbers n such that string 7,1 occurs in the base 10 representation of n but not of n-1.

71, 171, 271, 371, 471, 571, 671, 710, 771, 871, 971, 1071, 1171, 1271, 1371, 1471, 1571, 1671, 1710, 1771, 1871, 1971, 2071, 2171, 2271, 2371, 2471, 2571, 2671, 2710, 2771, 2871, 2971, 3071, 3171, 3271, 3371, 3471, 3571