# A372991 (b-file synthesized from sequence entry)
0 1
1 1
2 24
3 30
4 56
5 2160
6 3960
7 10192
8 518400
9 1211760
10 3872960
11 239500800
12 668891520
13 2517424000
14 181062604800
15 581935622400
16 2497284608000
17 203152242585600
18 733238884224000
19 3511182158848000
20 316917498433536000
21 1262637358633728000
22 6643156644540416000