A044521 Numbers n such that string 0,2 occurs in the base 7 representation of n but not of n+1.

51, 100, 149, 198, 247, 296, 345, 363, 394, 443, 492, 541, 590, 639, 688, 706, 737, 786, 835, 884, 933, 982, 1031, 1049, 1080, 1129, 1178, 1227, 1276, 1325, 1374, 1392, 1423, 1472, 1521, 1570, 1619, 1668, 1717, 1735, 1766, 1815