n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 20 |
5 | 168 |
6 | 3659 |
7 | 204644 |
8 | 25503314 |
9 | 7434144333 |
10 | 5248999682258 |
11 | 8079852389207554 |
12 | 28328874782544308254 |
13 | 244277149833867010587231 |
14 | 4673118265932181394325207044 |
15 | 198007423467261943865049734612821 |
[1,1,2,5,20,168,3659,204644,25503314,7434144333, 5248999682258,8079852389207554, 28328874782544308254,244277149833867010587231, 4673118265932181394325207044, 198007423467261943865049734612821] |