n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 5 |
4 | 24 |
5 | 154 |
6 | 1280 |
7 | 13005 |
8 | 156800 |
9 | 2189726 |
10 | 34793472 |
11 | 620169186 |
12 | 12259602432 |
13 | 266267950740 |
14 | 6304157663232 |
15 | 161624247752253 |
16 | 4461403146190848 |
17 | 131936409635518774 |
18 | 4161949856324648960 |
19 | 139508340802911502422 |
20 | 4952126960969786064896 |
[1,2,5,24,154,1280,13005,156800,2189726,34793472, 620169186,12259602432,266267950740,6304157663232, 161624247752253,4461403146190848, 131936409635518774,4161949856324648960, 139508340802911502422,4952126960969786064896] |