n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 2520 |
5 | 1814400 |
6 | 1888563600 |
7 | 2979953776800 |
8 | 6935468956416000 |
9 | 23019567930463104000 |
10 | 105689740661883810432000 |
11 | 653795414851090462030080000 |
12 | 5326203537908913517889391360000 |
[0,0,0,2520,1814400,1888563600,2979953776800, 6935468956416000,23019567930463104000, 105689740661883810432000, 653795414851090462030080000, 5326203537908913517889391360000] |