# A152338 (b-file synthesized from sequence entry) 1 1 2 2 3 6 4 24 5 120 6 640 7 3924 8 27552 9 197364 10 1677640 11 16002846 12 159888834 13 1733332410 14 19754032288 15 242687959560 16 3279596665638