n | a(n) |
---|---|
1 | 4 |
2 | 21 |
3 | 91 |
4 | 375 |
5 | 1487 |
6 | 5835 |
7 | 22775 |
8 | 88683 |
9 | 344975 |
10 | 1341395 |
11 | 5214791 |
12 | 20271307 |
13 | 78797247 |
14 | 306290211 |
15 | 1190562423 |
16 | 4627750267 |
17 | 17988173039 |
18 | 69920406547 |
19 | 271782019879 |
20 | 1056422029931 |
21 | 4106332901663 |
22 | 15961395217283 |
23 | 62042250575063 |
[4,21,91,375,1487,5835,22775,88683,344975,1341395, 5214791,20271307,78797247,306290211,1190562423, 4627750267,17988173039,69920406547,271782019879, 1056422029931,4106332901663,15961395217283, 62042250575063] |