n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 8 |
3 | 52 |
4 | 478 |
5 | 5706 |
6 | 83824 |
7 | 1461944 |
8 | 29510268 |
9 | 676549450 |
10 | 17361810016 |
11 | 492999348348 |
12 | 15345359136232 |
13 | 519525230896322 |
14 | 19005788951346240 |
15 | 747102849650454256 |
16 | 31404054519248544016 |
17 | 1405608808807797838866 |
[1,2,8,52,478,5706,83824,1461944,29510268, 676549450,17361810016,492999348348,15345359136232, 519525230896322,19005788951346240, 747102849650454256,31404054519248544016, 1405608808807797838866] |