n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 12 |
3 | 88 |
4 | 720 |
5 | 6304 |
6 | 57792 |
7 | 547712 |
8 | 5323008 |
9 | 52761088 |
10 | 531311616 |
11 | 5420488704 |
12 | 55905767424 |
13 | 581954543616 |
14 | 6106210615296 |
15 | 64513688174592 |
16 | 685741070942208 |
17 | 7328106153115648 |
18 | 78684992821788672 |
19 | 848487859401261056 |
[1,2,12,88,720,6304,57792,547712,5323008,52761088, 531311616,5420488704,55905767424,581954543616, 6106210615296,64513688174592,685741070942208, 7328106153115648,78684992821788672, 848487859401261056] |