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 | 9 |
| 2 | 225 |
| 3 | 3249 |
| 4 | 50625 |
| 5 | 793881 |
| 6 | 12383361 |
| 7 | 193349025 |
| 8 | 3018953025 |
| 9 | 47135449449 |
| 10 | 735942652641 |
| 11 | 11490533873361 |
| 12 | 179405691966081 |
| 13 | 2801123686963449 |
| 14 | 43734921492423681 |
| 15 | 682848585990347841 |
| 16 | 10661553197658712449 |