# A172492 (b-file synthesized from sequence entry)
0 1
1 2
2 24
3 864
4 69120
5 10368000
6 2612736000
7 1024192512000
8 589934886912000
9 477847258398720000
10 525631984238592000000
11 763217641114435584000000
12 1428743424166223413248000000
13 3380406941577284595744768000000