n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 20 |
5 | 110 |
6 | 700 |
7 | 5005 |
8 | 40264 |
9 | 362796 |
10 | 3628680 |
11 | 39916635 |
12 | 479001380 |
13 | 6227020514 |
14 | 87178290836 |
15 | 1307674367545 |
16 | 20922789887440 |
17 | 355687428095320 |
18 | 6402373705727184 |
19 | 121645100408831031 |
20 | 2432902008176638860 |
21 | 51090942171709438670 |
22 | 1124000727777607678460 |
[1,1,2,5,20,110,700,5005,40264,362796,3628680, 39916635,479001380,6227020514,87178290836, 1307674367545,20922789887440,355687428095320, 6402373705727184,121645100408831031, 2432902008176638860,51090942171709438670, 1124000727777607678460] |