# A156034 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 1
4 6
5 8
6 80
7 45
8 280
9 896
10 145152
11 100800
12 13305600
13 68428800
14 7907328
15 90810720
16 326918592000
17 258306048000
18 79041650688000
19 64023737057280
20 55167845990400
21 10532043325440000
22 9289262213038080000
23 7805560609566720000
24 6893871130369327104