A044520 Numbers n such that string 0,1 occurs in the base 7 representation of n but not of n+1.

50, 99, 148, 197, 246, 295, 344, 356, 393, 442, 491, 540, 589, 638, 687, 699, 736, 785, 834, 883, 932, 981, 1030, 1042, 1079, 1128, 1177, 1226, 1275, 1324, 1373, 1385, 1422, 1471, 1520, 1569, 1618, 1667, 1716, 1728, 1765, 1814