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| n | a(n) |
|---|---|
| 1 | 25 |
| 2 | 361 |
| 3 | 5041 |
| 4 | 70225 |
| 5 | 978121 |
| 6 | 13623481 |
| 7 | 189750625 |
| 8 | 2642885281 |
| 9 | 36810643321 |
| 10 | 512706121225 |
| 11 | 7141075053841 |
| 12 | 99462344632561 |
| 13 | 1385331749802025 |
| 14 | 19295182152595801 |
| 15 | 268747218386539201 |
| 16 | 3743165875258953025 |
| 17 | 52135575035238803161 |
| 18 | 726154884618084291241 |
[25,361,5041,70225,978121,13623481,189750625, 2642885281,36810643321,512706121225,7141075053841, 99462344632561,1385331749802025,19295182152595801, 268747218386539201,3743165875258953025, 52135575035238803161,726154884618084291241] |