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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 25 |
| 2 | 400 |
| 3 | 5230 |
| 4 | 60991 |
| 5 | 661675 |
| 6 | 6836950 |
| 7 | 68263360 |
| 8 | 664838581 |
| 9 | 6356961325 |
| 10 | 59947423900 |
| 11 | 559395635890 |
| 12 | 5177995501771 |
| 13 | 47632122760975 |
| 14 | 436056971109250 |
| 15 | 3977028159426820 |
| 16 | 36166503547714561 |
| 17 | 328145135909292625 |
| 18 | 2972035570568581000 |
| 19 | 26880644285129620150 |
| 20 | 242859379929646660951 |
[1,25,400,5230,60991,661675,6836950,68263360, 664838581,6356961325,59947423900,559395635890, 5177995501771,47632122760975,436056971109250, 3977028159426820,36166503547714561, 328145135909292625,2972035570568581000, 26880644285129620150,242859379929646660951] |