# A213269 (b-file synthesized from sequence entry)
3 0
4 6
5 60
6 540
7 5040
8 50400
9 544320
10 6350400
11 79833600
12 1077753600
13 15567552000
14 239740300800
15 3923023104000
16 67999067136000
17 1244905998336000
18 24008901396480000
19 486580401635328000
20 10339833534750720000
21 229909239772692480000
22 5339003456943636480000