# A012348 (b-file synthesized from sequence entry)
0 0
1 2
2 8
3 368
4 18048
5 2068992
6 306585600
7 69776517120
8 20465184768000
9 7935055273328640
10 3823692307188940800
11 2274500815301011046400
12 1624840840672099644211200
13 1378125905023775157056962560