n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 4 |
4 | 22 |
5 | 116 |
6 | 716 |
7 | 5034 |
8 | 40314 |
9 | 362874 |
10 | 3628789 |
11 | 39916793 |
12 | 479001588 |
13 | 6227020788 |
14 | 87178291188 |
15 | 1307674367982 |
16 | 20922789887982 |
17 | 355687428095978 |
18 | 6402373705727977 |
19 | 121645100408831983 |
20 | 2432902008176639978 |
21 | 51090942171709439975 |
22 | 1124000727777607679972 |
[0,0,1,4,22,116,716,5034,40314,362874,3628789, 39916793,479001588,6227020788,87178291188, 1307674367982,20922789887982,355687428095978, 6402373705727977,121645100408831983, 2432902008176639978,51090942171709439975, 1124000727777607679972] |