n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 34 |
4 | 376 |
5 | 5896 |
6 | 107104 |
7 | 2445664 |
8 | 61835776 |
9 | 1853785216 |
10 | 60075541504 |
11 | 2229983878144 |
12 | 88157067006976 |
13 | 3901637972801536 |
14 | 182049480718741504 |
15 | 9356335870657921024 |
16 | 503257631887961522176 |
17 | 29455739077723718189056 |
18 | 1794347026494847887867904 |
19 | 117825990265521485020463104 |
[1,1,4,34,376,5896,107104,2445664,61835776, 1853785216,60075541504,2229983878144, 88157067006976,3901637972801536, 182049480718741504,9356335870657921024, 503257631887961522176,29455739077723718189056, 1794347026494847887867904, 117825990265521485020463104] |