# 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