# A301737 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 3
4 8
5 30
6 144
7 840
8 5760
9 45360
10 403200
11 570240
12 43545600
13 518918400
14 6706022400
15 93405312000
16 126804787200
17 22230464256000
18 53801459712000
19 6758061133824000
20 128047474114560000
21 2554547108585472000
22 53523844179886080000