A077813 Squarefree numbers containing in their decimal representation only the digits 0 and 1.

1, 10, 11, 101, 110, 111, 1001, 1010, 1011, 1101, 1110, 1111, 10001, 10010, 10011, 10101, 10110, 10111, 11001, 11010, 11101, 11110, 11111, 100001, 100010, 100011, 100101, 100110, 100111, 101001, 101010, 101011, 101101, 101110, 101111, 110001