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| n | a(n) |
|---|---|
| 1 | 25 |
| 2 | 81 |
| 3 | 1089 |
| 4 | 16641 |
| 5 | 4198401 |
| 6 | 67125249 |
| 7 | 17180131329 |
| 8 | 274878955521 |
| 9 | 70368760954881 |
| 10 | 288230377225453569 |
| 11 | 4611686022722355201 |
| 12 | 18889465931753458761729 |
| 13 | 4835703278462914745335809 |
| 14 | 77371252455353859367239681 |
| 15 | 19807040628566365873362698241 |
[25,81,1089,16641,4198401,67125249,17180131329, 274878955521,70368760954881,288230377225453569, 4611686022722355201,18889465931753458761729, 4835703278462914745335809, 77371252455353859367239681, 19807040628566365873362698241] |