# A215254 0 1 1 10 2 100 3 1001 4 10010 5 100101 6 1001101 7 10010110 8 101001101 9 1001011001 10 10010110010 11 100101100101 12 1001101001101 13 10010110010110 14 101001101001101 15 1001011001011001 16 10010110010110010 17 100101100101100101 18 1001101001101001101 19 10010110010110010110 20 101001101001101001101 21 1001011001011001011001 22 10010110010110010110010 23 100101100101100101100101 24 1001101001101001101001101 25 10010110010110010110010110 26 101001101001101001101001101