n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 7 |
4 | 25 |
5 | 61 |
6 | 1561 |
7 | 10291 |
8 | 40657 |
9 | 1754425 |
10 | 16632721 |
11 | 90479071 |
12 | 5469933481 |
13 | 67591594357 |
14 | 468224398825 |
15 | 36386954606731 |
16 | 554182030325281 |
17 | 4663003095358321 |
18 | 442756825853252257 |
19 | 8014853488848923575 |
20 | 79354642490200806841 |
21 | 8901962495566386752941 |
[1,1,1,7,25,61,1561,10291,40657,1754425,16632721, 90479071,5469933481,67591594357,468224398825, 36386954606731,554182030325281,4663003095358321, 442756825853252257,8014853488848923575, 79354642490200806841,8901962495566386752941] |