n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 30 |
4 | 240 |
5 | 2520 |
6 | 30600 |
7 | 413280 |
8 | 6168960 |
9 | 101666880 |
10 | 1842825600 |
11 | 36483955200 |
12 | 782548905600 |
13 | 18048500870400 |
14 | 444816333561600 |
15 | 11656620213638400 |
16 | 323500679915212800 |
17 | 9475966585948262400 |
18 | 292101319958063616000 |
19 | 9450373008137757696000 |
[1,2,6,30,240,2520,30600,413280,6168960,101666880, 1842825600,36483955200,782548905600, 18048500870400,444816333561600,11656620213638400, 323500679915212800,9475966585948262400, 292101319958063616000,9450373008137757696000] |