A044527 Numbers n such that string 1,1 occurs in the base 7 representation of n but not of n+1.

8, 62, 106, 155, 204, 253, 302, 351, 440, 449, 498, 547, 596, 645, 694, 748, 792, 841, 890, 939, 988, 1037, 1091, 1135, 1184, 1233, 1282, 1331, 1380, 1434, 1478, 1527, 1576, 1625, 1674, 1723, 1777, 1821, 1870, 1919, 1968