# A165173 (b-file synthesized from sequence entry)
0 1
1 41
2 1640
3 65600
4 2624000
5 104960000
6 4198400000
7 167936000000
8 6717439999180
9 268697599934400
10 10747903996064820
11 429916159790145600
12 17196646389507936000
13 687865855496401920000
14 27514634216499456000000