A044437 Numbers n such that string 1,1 occurs in the base 3 representation of n but not of n+1.

4, 14, 22, 31, 44, 49, 58, 68, 76, 85, 95, 103, 134, 139, 149, 157, 166, 176, 184, 193, 206, 211, 220, 230, 238, 247, 257, 265, 274, 287, 292, 301, 311, 319, 404, 409, 419, 427, 436, 449, 454, 463, 473, 481, 490, 500, 508, 517