# A090220 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 1
5 2
6 10
7 20
8 70
9 560
10 1680
11 2800
12 30800
13 369600
14 800800
15 11211200
16 168168000
17 448448000
18 7623616000
19 137225088000
20 434546112000
21 8690922240000
22 182509367040000
23 669201012480000
24 15391623287040000
25 369398958888960000