n | a(n) |
---|---|
1 | 1 |
2 | 5 |
3 | 23 |
4 | 120 |
5 | 724 |
6 | 5012 |
7 | 39332 |
8 | 345832 |
9 | 3371976 |
10 | 36135792 |
11 | 422379792 |
12 | 5349561984 |
13 | 72996193152 |
14 | 1067779243008 |
15 | 16670798231040 |
16 | 276718772067840 |
17 | 4866610479828480 |
18 | 90401487246167040 |
19 | 1768784607499944960 |
20 | 36360467544043008000 |
21 | 783508616506603008000 |
[1,5,23,120,724,5012,39332,345832,3371976, 36135792,422379792,5349561984,72996193152, 1067779243008,16670798231040,276718772067840, 4866610479828480,90401487246167040, 1768784607499944960,36360467544043008000, 783508616506603008000] |