n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 2 |
5 | 2 |
6 | 24 |
7 | 24 |
8 | 384 |
9 | 3456 |
10 | 276480 |
11 | 276480 |
12 | 955514880 |
13 | 955514880 |
14 | 428070666240 |
15 | 866843099136000 |
16 | 1775294667030528000 |
17 | 1775294667030528000 |
18 | 331312591939905257472000 |
19 | 331312591939905257472000 |
20 | 339264094146462983651328000000 |
[1,1,1,1,2,2,24,24,384,3456,276480,276480, 955514880,955514880,428070666240,866843099136000, 1775294667030528000,1775294667030528000, 331312591939905257472000,331312591939905257472000, 339264094146462983651328000000] |