A044486 Numbers n such that string 0,3 occurs in the base 6 representation of n but not of n+1.

39, 75, 111, 147, 183, 219, 239, 255, 291, 327, 363, 399, 435, 455, 471, 507, 543, 579, 615, 651, 671, 687, 723, 759, 795, 831, 867, 887, 903, 939, 975, 1011, 1047, 1083, 1103, 1119, 1155, 1191, 1227, 1263, 1299, 1319, 1335