A043941 Numbers n such that 1 and 4 occur juxtaposed in the base 8 representation of n but not of n+1.

12, 33, 76, 103, 140, 161, 204, 225, 271, 289, 332, 353, 396, 417, 460, 481, 524, 545, 588, 615, 652, 673, 716, 737, 831, 844, 865, 908, 929, 972, 993, 1036, 1057, 1100, 1127, 1164, 1185, 1228, 1249, 1295, 1313, 1356, 1377