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| n | a(n) |
|---|---|
| 1 | 900 |
| 2 | 3364 |
| 3 | 12544 |
| 4 | 46656 |
| 5 | 173056 |
| 6 | 643204 |
| 7 | 2390116 |
| 8 | 8880400 |
| 9 | 32993536 |
| 10 | 122589184 |
| 11 | 455480964 |
| 12 | 1692335044 |
| 13 | 6287855616 |
| 14 | 23362511104 |
| 15 | 86803301376 |
| 16 | 322517224836 |
| 17 | 1198311166276 |
| 18 | 4452319442704 |
| 19 | 16542571369536 |
| 20 | 61463843852544 |
[900,3364,12544,46656,173056,643204,2390116, 8880400,32993536,122589184,455480964,1692335044, 6287855616,23362511104,86803301376,322517224836, 1198311166276,4452319442704,16542571369536, 61463843852544] |