A044577 Numbers n such that string 1,1 occurs in the base 8 representation of n but not of n+1.

9, 79, 137, 201, 265, 329, 393, 457, 521, 639, 649, 713, 777, 841, 905, 969, 1033, 1103, 1161, 1225, 1289, 1353, 1417, 1481, 1545, 1615, 1673, 1737, 1801, 1865, 1929, 1993, 2057, 2127, 2185, 2249, 2313, 2377, 2441, 2505