# A072118 (b-file synthesized from sequence entry)
1 1
2 2
3 5
4 224
5 672
6 2737152
7 8895744
8 474439680
9 130660687872
10 4513732853760000
11 15798064988160000
12 894413525483520000
13 3194334019584000000
14 27610545531676262400000
15 8107146431738442547200000