# A371121 (b-file synthesized from sequence entry) 0 1 1 0 2 2 3 3 4 56 5 330 6 5724 7 68460 8 1351552 9 24594192 10 578257200 11 13915923120 12 389216689344 13 11518744311360 14 377576873670528 15 13185760854520800 16 497969104450867200 17 19992393239486976000 18 856421361373185137664 19 38819358713756193292800