# A377687 (b-file synthesized from sequence entry)
0 1
1 0
2 2
3 3
4 80
5 570
6 12744
7 198660
8 4969152
9 119968128
10 3607836480
11 115031711520
12 4163170478400
13 162622297300320
14 6952158785424384
15 319741032356928000
16 15818989359665802240
17 835755271882288128000
18 47015148988105365288960
19 2804276310235518168161280