# A152665 (b-file synthesized from sequence entry)
1 0
2 1
3 2
4 16
5 60
6 540
7 3024
8 32256
9 241920
10 3024000
11 28512000
12 410572800
13 4670265600
14 76281004800
15 1017080064000
16 18598035456000
17 284549942476800
18 5762136335155200
19 99527809425408000
20 2211729098342400000
21 42575785143091200000
22 1030334000462807040000