# A090114 (b-file synthesized from sequence entry)
1 1
2 2
3 24
4 360
5 30240
6 665280
7 57657600
8 1764322560
9 180503769600
10 47621141568000
11 2180547008640000
12 599555620984320000
13 74931129164795904000
14 4608264443634948096000
15 669187660275478536192000
16 216826941136228916613120000
17 70265584374661732509573120000
18 5922384968721488882949734400000