# A177861 (b-file synthesized from sequence entry)
1 1
2 2
3 6
4 90
5 6720
6 36960
7 11642400
8 283046400
9 2412984420000
10 1140422816332800
11 1226781977195174400
12 1863152400854384640000
13 5988092802221559085056000
14 112886540292742916603904000
15 158983195607776600998537600000000