# A124903 (b-file synthesized from sequence entry)
5 2
6 12
7 30
8 240
9 720
10 60480
11 60480
12 7983360
13 1108800
14 518918400
15 21794572800
16 62270208000
17 87178291200
18 35568742809600
19 2
20 40548366802944000
21 304112751022080000
22 851515702861824000
23 2534272925184000
24 5170403347776995328000
25 51704033477769953280000