# A356913 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 0
4 4
5 10
6 40
7 210
8 784
9 5040
10 40200
11 369600
12 5285280
13 72072000
14 1006889520
15 14760345600
16 210510263040
17 3131345817600
18 49229619129600
19 818940523564800
20 15054020163619200
21 301204611031564800
22 6455999452413772800
23 146587705490513548800