n | a(n) |
---|---|
0 | 2 |
1 | 9 |
2 | 41 |
3 | 187 |
4 | 853 |
5 | 3891 |
6 | 17749 |
7 | 80963 |
8 | 369317 |
9 | 1684659 |
10 | 7684661 |
11 | 35053987 |
12 | 159900613 |
13 | 729395091 |
14 | 3327174229 |
15 | 15177080963 |
16 | 69231056357 |
17 | 315801119859 |
18 | 1440543486581 |
19 | 6571115193187 |
20 | 29974488992773 |
21 | 136730214577491 |
22 | 623702094901909 |
23 | 2845050045354563 |
[2,9,41,187,853,3891,17749,80963,369317,1684659, 7684661,35053987,159900613,729395091,3327174229, 15177080963,69231056357,315801119859, 1440543486581,6571115193187,29974488992773, 136730214577491,623702094901909,2845050045354563] |