# A007756 (b-file synthesized from sequence entry) 1 0 2 0 3 1 4 1 5 2 6 3 7 11 8 38 9 156 10 638 11 2973 12 13882 13 67868 14 338147 15 1720303 16 8905996 17 46774728 18 248918004 19 1340083514 20 7288922610 21 40019870539 22 221582395052 23 1236358849827