# A294705 (b-file synthesized from sequence entry)
1 1
2 720
3 103680
4 1474560
5 37440000
6 74649600
7 1659571200
8 3019898880
9 18366600960
10 26956800000
11 257213088000
12 152882380800
13 1644455554560
14 1194891264000
15 3881779200000
16 6184752906240
17 32143905423360
18 13223952691200
19 110052644025600
20 55207526400000
21 172064342016000
22 185193423360000