# A085864 (b-file synthesized from sequence entry)
1 2
2 4
3 12
4 72
5 864
6 20736
7 933120
8 117573120
9 42326323200
10 36315985305600
11 146426052752179200
12 1475974611741966336000
13 37784950060594338201600000
14 2031318915257551621718016000000
15 212719716805770805826310635520000000