# A166356 (b-file synthesized from sequence entry)
0 1
1 2
2 8
3 144
4 5760
5 403200
6 43545600
7 6706022400
8 1394852659200
9 376610217984000
10 128047474114560000
11 53523844179886080000
12 26976017466662584320000
13 16131658445064225423360000
14 11292160911544957796352000000
15 9146650338351415815045120000000