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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 25 |
| 4 | 49 |
| 5 | 1331 |
| 6 | 2197 |
| 7 | 83521 |
| 8 | 130321 |
| 9 | 279841 |
| 10 | 707281 |
| 11 | 28629151 |
| 12 | 69343957 |
| 13 | 4750104241 |
| 14 | 6321363049 |
| 15 | 10779215329 |
| 16 | 22164361129 |
| 17 | 2488651484819 |
| 18 | 3142742836021 |
| 19 | 406067677556641 |
| 20 | 645753531245761 |
| 21 | 806460091894081 |
| 22 | 1517108809906561 |
| 23 | 186940255267540403 |
| 24 | 350356403707485209 |
| 25 | 760231058654565217 |
[1,3,25,49,1331,2197,83521,130321,279841,707281, 28629151,69343957,4750104241,6321363049, 10779215329,22164361129,2488651484819, 3142742836021,406067677556641,645753531245761, 806460091894081,1517108809906561, 186940255267540403,350356403707485209, 760231058654565217] |