n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 3 |
4 | 16 |
5 | 115 |
6 | 660 |
7 | 5033 |
8 | 39936 |
9 | 362718 |
10 | 3624920 |
11 | 39916789 |
12 | 478953648 |
13 | 6227020787 |
14 | 87177645996 |
15 | 1307674338105 |
16 | 20922779566080 |
17 | 355687428095983 |
18 | 6402373519409856 |
19 | 121645100408831981 |
20 | 2432902004460734000 |
21 | 51090942171698415483 |
22 | 1124000727695858073380 |
[1,0,3,16,115,660,5033,39936,362718,3624920, 39916789,478953648,6227020787,87177645996, 1307674338105,20922779566080,355687428095983, 6402373519409856,121645100408831981, 2432902004460734000,51090942171698415483, 1124000727695858073380] |