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| n | a(n) |
|---|---|
| 1 | 25 |
| 2 | 625 |
| 3 | 2625 |
| 4 | 11025 |
| 5 | 110775 |
| 6 | 1113025 |
| 7 | 6835345 |
| 8 | 41977441 |
| 9 | 336253621 |
| 10 | 2693506201 |
| 11 | 18577402747 |
| 12 | 128130350209 |
| 13 | 960194962333 |
| 14 | 7195597016521 |
| 15 | 51458156348129 |
| 16 | 367994740209721 |
| 17 | 2701833829557059 |
| 18 | 19836984730756561 |
| 19 | 143485534654475891 |
[25,625,2625,11025,110775,1113025,6835345, 41977441,336253621,2693506201,18577402747, 128130350209,960194962333,7195597016521, 51458156348129,367994740209721,2701833829557059, 19836984730756561,143485534654475891] |