# A196442 (b-file synthesized from sequence entry)
1 1
2 1
3 3
4 4
5 60
6 30
7 2520
8 6720
9 45360
10 604800
11 19958400
12 3991680
13 3113510400
14 14529715200
15 163459296000
16 3487131648000
17 177843714048000
18 266765571072000
19 60822550204416000
20 67580611338240000
21 6386367771463680000
22 187333454629601280000
23 12926008369442488320000
24 5170403347776995328000
25 7755605021665492992000000
26 67215243521100939264000000