A044248 Numbers n such that string 7,5 occurs in the base 8 representation of n but not of n-1.

61, 125, 189, 253, 317, 381, 445, 488, 509, 573, 637, 701, 765, 829, 893, 957, 1000, 1021, 1085, 1149, 1213, 1277, 1341, 1405, 1469, 1512, 1533, 1597, 1661, 1725, 1789, 1853, 1917, 1981, 2024, 2045, 2109, 2173, 2237, 2301