# A176475 (b-file synthesized from sequence entry)
1 0
2 1
3 2
4 8
5 24
6 136
7 960
8 5312
9 40320
10 491776
11 4112640
12 40270592
13 638668800
14 6249389056
15 91883151360
16 1919826163712
17 20922789888000
18 355897293438976
19 8676514912665600
20 121674189293944832
21 2757288942600192000