# A372988 (b-file synthesized from sequence entry)
0 1
1 1
2 12
3 120
4 140
5 252
6 4752
7 68640
8 109200
9 257040
10 6139584
11 109549440
12 210974400
13 591192000
14 16576876800
15 343108846080
16 758663942400
17 2419157664000
18 76585170816000
19 1777303822694400
20 4379008275532800
21 15472932418944000
22 540078624594432000
23 13756331587654656000