n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 11 |
6 | 87 |
7 | 625 |
8 | 4378 |
9 | 30671 |
10 | 216883 |
11 | 1552588 |
12 | 11257405 |
13 | 82635707 |
14 | 613600423 |
15 | 4604595573 |
16 | 34889238855 |
17 | 266697050660 |
18 | 2055119789289 |
[0,0,0,1,11,87,625,4378,30671,216883,1552588, 11257405,82635707,613600423,4604595573, 34889238855,266697050660,2055119789289] |