Least positive multiple of n written in base 4 using only 0 and 1.

Terms

a(0) =1a(1) =10a(2) =111a(3) =10a(4) =11a(5) =1110a(6) =111a(7) =100a(8) =1101a(9) =110a(10) =11111a(11) =1110a(12) =1001a(13) =1110a(14) =111111a(15) =100a(16) =101a(17) =11010a(18) =100111a(19) =110a(20) =111a(21) =111110a(22) =1011a(23) =11100a(24) =11011a(25) =10010a(26) =1101a(27) =1110a(28) =10011a(29) =1111110