n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 20 |
3 | 360 |
4 | 9360 |
5 | 318240 |
6 | 13366080 |
7 | 668304000 |
8 | 38761632000 |
9 | 2558267712000 |
10 | 189311810688000 |
11 | 15523568476416000 |
12 | 1397121162877440000 |
13 | 136917873961989120000 |
14 | 14513294639970846720000 |
15 | 1654515588956676526080000 |
16 | 201850901852714536181760000 |
17 | 26240617240852889703628800000 |
[1,2,20,360,9360,318240,13366080,668304000, 38761632000,2558267712000,189311810688000, 15523568476416000,1397121162877440000, 136917873961989120000,14513294639970846720000, 1654515588956676526080000, 201850901852714536181760000, 26240617240852889703628800000] |