# A027139 (b-file synthesized from sequence entry) 0 2 1 7 2 23 3 72 4 218 5 648 6 1907 7 5581 8 16290 9 47502 10 138521 11 404183 12 1180402 13 3450899 14 10099605 15 29589780 16 86781374 17 254761882 18 748580729 19 2201465799 20 6479301022 21 19083705249 22 56246157177 23 165881453558 24 489506759446