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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 625 |
| 2 | 6561 |
| 3 | 28561 |
| 4 | 83521 |
| 5 | 194481 |
| 6 | 390625 |
| 7 | 707281 |
| 8 | 1185921 |
| 9 | 1874161 |
| 10 | 2825761 |
| 11 | 4100625 |
| 12 | 5764801 |
| 13 | 7890481 |
| 14 | 10556001 |
| 15 | 13845841 |
| 16 | 17850625 |
| 17 | 22667121 |
| 18 | 28398241 |
| 19 | 35153041 |
| 20 | 43046721 |
| 21 | 52200625 |
| 22 | 62742241 |
| 23 | 74805201 |
| 24 | 88529281 |
| 25 | 104060401 |
| 26 | 121550625 |
| 27 | 141158161 |
| 28 | 163047361 |
[1,625,6561,28561,83521,194481,390625,707281, 1185921,1874161,2825761,4100625,5764801,7890481, 10556001,13845841,17850625,22667121,28398241, 35153041,43046721,52200625,62742241,74805201, 88529281,104060401,121550625,141158161,163047361] |