# A107270 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 8
4 72
5 1440
6 55008
7 3507840
8 342679680
9 48401625600
10 9472057781760
11 2484361405532160
12 850218223244544000
13 371335242657899520000
14 203148791342840318976000
15 137006974339300359770112000