A043164 Numbers n such that 1 and 7 occur juxtaposed in the base 8 representation of n but not of n-1.

15, 57, 79, 120, 143, 185, 207, 249, 271, 313, 335, 377, 399, 441, 456, 505, 527, 569, 591, 632, 655, 697, 719, 761, 783, 825, 847, 889, 911, 953, 960, 1039, 1081, 1103, 1144, 1167, 1209, 1231, 1273, 1295, 1337, 1359, 1401