A044236 Numbers n such that string 6,1 occurs in the base 8 representation of n but not of n-1.

49, 113, 177, 241, 305, 369, 392, 433, 497, 561, 625, 689, 753, 817, 881, 904, 945, 1009, 1073, 1137, 1201, 1265, 1329, 1393, 1416, 1457, 1521, 1585, 1649, 1713, 1777, 1841, 1905, 1928, 1969, 2033, 2097, 2161, 2225, 2289, 2353