# A138379 (b-file synthesized from sequence entry)
1 1
2 6
3 60
4 888
5 18120
6 485280
7 16445520
8 685722240
9 34411184640
10 2041544736000
11 141106965753600
12 11223409849344000
13 1016591564596608000
14 103921686070339737600
15 11896153817325313536000