# A268149 (b-file synthesized from sequence entry)
0 0
1 24
2 1120
3 33264
4 823680
5 18475600
6 389398464
7 7862853600
8 153876579840
9 2940343837200
10 55138611528000
11 1018383898440480
12 18574619721465600
13 335240928272918304
14 5996573430996184960
15 106438123408375281600
16 1876607120325212706816
17 32891715945378106711440