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 | 15 |
| 3 | 25 |
| 4 | 51 |
| 5 | 85 |
| 6 | 289 |
| 7 | 771 |
| 8 | 1285 |
| 9 | 4369 |
| 10 | 66049 |
| 11 | 196611 |
| 12 | 327685 |
| 13 | 1114129 |
| 14 | 16843009 |
| 15 | 4295098369 |