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 | 5 |
| 2 | 89 |
| 3 | 809 |
| 4 | 3954889 |
| 5 | 15186319 |
| 6 | 77011289 |
| 7 | 288413159 |
| 8 | 62585146739 |
| 9 | 114058236679 |
| 10 | 143014298809 |
| 11 | 2320700383121 |
| 12 | 2942277160583 |
| 13 | 4386778243843 |
| 14 | 16104860854333 |
| 15 | 23171469790747 |