n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 1 |
6 | 13 |
7 | 49 |
8 | 205 |
9 | 661 |
10 | 1997 |
11 | 13307 |
12 | 88591 |
13 | 614455 |
14 | 6581035 |
15 | 95397503 |
16 | 1522572859 |
17 | 23440615715 |
18 | 367710019427 |
19 | 8011532526037 |
20 | 207007785752989 |
21 | 6626542824985383 |
[1,1,1,1,1,13,49,205,661,1997,13307,88591,614455, 6581035,95397503,1522572859,23440615715, 367710019427,8011532526037,207007785752989, 6626542824985383] |