n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 15 |
3 | 317 |
4 | 12586 |
5 | 803764 |
6 | 75603729 |
7 | 9880078404 |
8 | 1719511013708 |
9 | 385900586669488 |
10 | 108870763685147631 |
11 | 37821200661333033093 |
12 | 15903952714275755480410 |
13 | 7978911737260660423782839 |
14 | 4717171385049289138016854041 |
15 | 3251403192784472823846341645000 |
[1,2,15,317,12586,803764,75603729,9880078404, 1719511013708,385900586669488,108870763685147631, 37821200661333033093,15903952714275755480410, 7978911737260660423782839, 4717171385049289138016854041, 3251403192784472823846341645000] |