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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 25 |
| 2 | 49 |
| 3 | 289 |
| 4 | 961 |
| 5 | 4225 |
| 6 | 16129 |
| 7 | 66049 |
| 8 | 261121 |
| 9 | 1050625 |
| 10 | 4190209 |
| 11 | 16785409 |
| 12 | 67092481 |
| 13 | 268468225 |
| 14 | 1073676289 |
| 15 | 4295098369 |
| 16 | 17179607041 |
| 17 | 68720001025 |
| 18 | 274876858369 |
| 19 | 1099513724929 |
| 20 | 4398042316801 |
| 21 | 17592194433025 |
| 22 | 70368727400449 |
[1,25,49,289,961,4225,16129,66049,261121,1050625, 4190209,16785409,67092481,268468225,1073676289, 4295098369,17179607041,68720001025,274876858369, 1099513724929,4398042316801,17592194433025, 70368727400449] |