A004286 Least positive multiple of n written in base 6 using only 0 and 1.

1, 10, 10, 100, 11111, 10, 11, 1000, 100, 111110, 1101, 100, 10111, 110, 111110, 10000, 11001, 100, 101011, 1111100, 110, 11010, 1101, 1000, 111101, 101110, 1000, 1100, 1100001, 111110, 1001, 100000, 11010, 110010, 1111111111, 100