# A167406 (b-file synthesized from sequence entry)
1 0
2 4
3 64
4 2880
5 208896
6 23193600
7 3640688640
8 768126320640
9 209688566169600
10 71921062285148160
11 30278182590480384000
12 15350836256712740044800
13 9225766813653105691852800
14 6485670333458406942179328000
15 5272823572160895949091320627200