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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 29 |
| 3 | 177 |
| 4 | 1097 |
| 5 | 6829 |
| 6 | 42565 |
| 7 | 265401 |
| 8 | 1654993 |
| 9 | 10320533 |
| 10 | 64359341 |
| 11 | 401348865 |
| 12 | 2502838169 |
| 13 | 15607867837 |
| 14 | 97331722837 |
| 15 | 606967236489 |
| 16 | 3785088940705 |
| 17 | 23604071924261 |
| 18 | 147196597046333 |
| 19 | 917927985203793 |
| 20 | 5724261314120681 |
| 21 | 35696882675723725 |
| 22 | 222608186950462309 |
| 23 | 1388199786170737497 |
[1,5,29,177,1097,6829,42565,265401,1654993, 10320533,64359341,401348865,2502838169, 15607867837,97331722837,606967236489, 3785088940705,23604071924261,147196597046333, 917927985203793,5724261314120681, 35696882675723725,222608186950462309, 1388199786170737497] |