# A207817 (b-file synthesized from sequence entry)
0 1
1 12
2 840
3 92400
4 12612600
5 1955457504
6 329820499008
7 59064793444800
8 11062343605599000
9 2145275226626532000
10 427760079188506384320
11 87255985739923260973440
12 18139177035549431752363200
13 3831766983249199488516960000
14 820623729024838763928509760000