This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 9 |
| 3 | 15 |
| 4 | 625 |
| 5 | 1225 |
| 6 | 3993 |
| 7 | 117649 |
| 8 | 218491 |
| 9 | 857375 |
| 10 | 3788435 |
| 11 | 4259571 |
| 12 | 69302975 |
| 13 | 136410197 |
| 14 | 200533921 |
| 15 | 313742585 |
| 16 | 603439225 |
| 17 | 1516358753 |
| 18 | 2563893625 |
| 19 | 3326174929 |
| 20 | 5655792025 |
| 21 | 10214476341 |
| 22 | 25937424601 |
| 23 | 29677977573 |
| 24 | 59797108943 |
| 25 | 283867750439 |
| 26 | 715167055525 |