A044625 Numbers n such that string 7,1 occurs in the base 8 representation of n but not of n+1.

57, 121, 185, 249, 313, 377, 441, 463, 505, 569, 633, 697, 761, 825, 889, 953, 975, 1017, 1081, 1145, 1209, 1273, 1337, 1401, 1465, 1487, 1529, 1593, 1657, 1721, 1785, 1849, 1913, 1977, 1999, 2041, 2105, 2169, 2233, 2297, 2361