| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 25 |
| 2 | 415 |
| 3 | 5805 |
| 4 | 74271 |
| 5 | 902325 |
| 6 | 10616455 |
| 7 | 122340685 |
| 8 | 1390355791 |
| 9 | 15651303525 |
| 10 | 175025553495 |
| 11 | 1948179192765 |
| 12 | 21613189505311 |
| 13 | 239210965847125 |
| 14 | 2643048211482535 |
| 15 | 29167353171072045 |
| 16 | 321591476229774831 |
[1,25,415,5805,74271,902325,10616455,122340685, 1390355791,15651303525,175025553495,1948179192765, 21613189505311,239210965847125,2643048211482535, 29167353171072045,321591476229774831] |