# A371040 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 12
4 96
5 840
6 9720
7 143640
8 2399040
9 45239040
10 976752000
11 23537606400
12 621444700800
13 17936155036800
14 562855739846400
15 19038932398886400
16 690456599575142400
17 26748823900403404800
18 1102407824344284057600
19 48147134965603914240000