# A152349 (b-file synthesized from sequence entry) 1 1 2 2 3 6 4 24 5 120 6 608 7 3684 8 23136 9 185772 10 1557704 11 14531768 12 142953580 13 1530728460 14 17401543208 15 210735290068 16 2698171998814