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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 17 |
| 3 | 41 |
| 4 | 373 |
| 5 | 823 |
| 6 | 3565 |
| 7 | 7625 |
| 8 | 129293 |
| 9 | 272171 |
| 10 | 1139735 |
| 11 | 2376047 |
| 12 | 19743201 |
| 13 | 40890483 |
| 14 | 168947957 |
| 15 | 348259369 |
| 16 | 11464229693 |
| 17 | 23547218611 |
| 18 | 96587303059 |
| 19 | 197831583443 |
| 20 | 1618881562939 |
| 21 | 3308327420393 |
| 22 | 13508555185547 |
| 23 | 27554570432479 |
| 24 | 449278087454089 |
[3,17,41,373,823,3565,7625,129293,272171,1139735, 2376047,19743201,40890483,168947957,348259369, 11464229693,23547218611,96587303059,197831583443, 1618881562939,3308327420393,13508555185547, 27554570432479,449278087454089] |