A043949 Numbers n such that 2 and 7 occur juxtaposed in the base 8 representation of n but not of n+1.

23, 58, 87, 122, 151, 191, 215, 250, 279, 314, 343, 378, 407, 442, 471, 506, 535, 570, 599, 634, 663, 703, 727, 762, 791, 826, 855, 890, 919, 954, 983, 1018, 1047, 1082, 1111, 1146, 1175, 1215, 1239, 1274, 1303, 1338, 1367