n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 30 |
6 | 240 |
7 | 3120 |
8 | 65520 |
9 | 2227680 |
10 | 122522400 |
11 | 10904493600 |
12 | 1570247078400 |
13 | 365867569267200 |
14 | 137932073613734400 |
15 | 84138564904377984000 |
16 | 83044763560621070208000 |
17 | 132622487406311849122176000 |
18 | 342696507457909818131702784000 |
[1,1,1,2,6,30,240,3120,65520,2227680,122522400, 10904493600,1570247078400,365867569267200, 137932073613734400,84138564904377984000, 83044763560621070208000, 132622487406311849122176000, 342696507457909818131702784000] |