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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 25 |
| 3 | 784 |
| 4 | 27225 |
| 5 | 1002001 |
| 6 | 38291344 |
| 7 | 1502337600 |
| 8 | 60101954649 |
| 9 | 2440703175625 |
| 10 | 100300325150025 |
| 11 | 4161829109817600 |
| 12 | 174077451630810000 |
| 13 | 7330421677037621904 |
| 14 | 310467090932230849600 |
| 15 | 13214837914326197526784 |
| 16 | 564927069263895118093401 |
[0,1,25,784,27225,1002001,38291344,1502337600, 60101954649,2440703175625,100300325150025, 4161829109817600,174077451630810000, 7330421677037621904,310467090932230849600, 13214837914326197526784,564927069263895118093401] |