# A293531 (b-file synthesized from sequence entry) 1 0 2 2 3 6 4 7 5 12 6 13 7 17 8 18 9 26 10 77 11 151 12 222 13 403 14 567 15 1107 16 7221 17 7722 18 8475 19 9729 20 17904 21 21404 22 30170 23 62523