A043940 Numbers n such that 1 and 3 occur juxtaposed in the base 8 representation of n but not of n+1.

11, 25, 75, 95, 139, 153, 207, 217, 267, 281, 331, 345, 395, 409, 459, 473, 523, 537, 587, 607, 651, 665, 767, 779, 793, 843, 857, 907, 921, 971, 985, 1035, 1049, 1099, 1119, 1163, 1177, 1231, 1241, 1291, 1305, 1355, 1369