# A004286 (b-file synthesized from sequence entry) 1 1 2 10 3 10 4 100 5 11111 6 10 7 11 8 1000 9 100 10 111110 11 1101 12 100 13 10111 14 110 15 111110 16 10000 17 11001 18 100 19 101011 20 1111100 21 110 22 11010 23 1101 24 1000 25 111101 26 101110 27 1000 28 1100 29 1010111 30 111110 31 1001 32 100000 33 11010 34 110010 35 1111111111 36 100 37 101 38 1010110 39 101110 40 11111000