# A134805 (b-file synthesized from sequence entry)
0 1
1 2
2 24
3 360
4 2016
5 16800
6 237600
7 151351200
8 605404800
9 30875644800
10 53330659200
11 6453009763200
12 11416863427200
13 1929449919196800
14 1929449919196800
15 93256746094512000
16 680225677395264000
17 196585220767231296000
18 93119315100267456000
19 1243794691794272409792000