n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 18 |
5 | 110 |
6 | 705 |
7 | 5019 |
8 | 40292 |
9 | 362844 |
10 | 3628755 |
11 | 39916745 |
12 | 479001534 |
13 | 6227020722 |
14 | 87178291109 |
15 | 1307674367895 |
16 | 20922789887880 |
17 | 355687428095864 |
18 | 6402373705727847 |
19 | 121645100408831829 |
20 | 2432902008176639810 |
21 | 51090942171709439790 |
22 | 1124000727777607679769 |
[1,1,1,3,18,110,705,5019,40292,362844,3628755, 39916745,479001534,6227020722,87178291109, 1307674367895,20922789887880,355687428095864, 6402373705727847,121645100408831829, 2432902008176639810,51090942171709439790, 1124000727777607679769] |