# A073030 (b-file synthesized from sequence entry) 2 1 3 11 4 101 5 1111 6 10001 7 111111 8 1010101 9 11011011 10 101000101 11 1111111111 12 10001010001 13 111111111111 14 1010100010101 15 11010011001011 16 101010101010101 17 1111111111111111 18 10001010001010001 19 111111111111111111