# A115775 (b-file synthesized from sequence entry) 0 0 1 101 2 1010 3 10100 4 10101 5 101000 6 101010 7 1010000 8 1010100 9 1010101 10 10100000 11 10101000 12 10101010 13 101000000 14 101010000 15 101010100 16 101010101 17 1010000000 18 1010000101 19 1010100000 20 1010101000 21 1010101010 22 10100000000