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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 25 |
| 2 | 205 |
| 3 | 1725 |
| 4 | 14645 |
| 5 | 124977 |
| 6 | 1069941 |
| 7 | 9179469 |
| 8 | 78869491 |
| 9 | 678323799 |
| 10 | 5838030793 |
| 11 | 50269401543 |
| 12 | 432996699399 |
| 13 | 3730477803939 |
| 14 | 32144938184273 |
| 15 | 277017865876053 |
| 16 | 2387456054541987 |
| 17 | 20577155216208681 |
| 18 | 177357954676723141 |
[1,25,205,1725,14645,124977,1069941,9179469, 78869491,678323799,5838030793,50269401543, 432996699399,3730477803939,32144938184273, 277017865876053,2387456054541987, 20577155216208681,177357954676723141] |