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| n | a(n) |
|---|---|
| 1 | 25 |
| 2 | 625 |
| 3 | 11047 |
| 4 | 192640 |
| 5 | 3375548 |
| 6 | 59151458 |
| 7 | 1037800112 |
| 8 | 18215805862 |
| 9 | 319825973303 |
| 10 | 5615850283553 |
| 11 | 98614829798053 |
| 12 | 1731697303682807 |
| 13 | 30409166647098498 |
| 14 | 533994742590497215 |
| 15 | 9377124049344199017 |
[25,625,11047,192640,3375548,59151458,1037800112, 18215805862,319825973303,5615850283553, 98614829798053,1731697303682807,30409166647098498, 533994742590497215,9377124049344199017] |