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 | 3 |
| 2 | 9 |
| 3 | 13 |
| 4 | 15 |
| 5 | 25 |
| 6 | 49 |
| 7 | 55 |
| 8 | 69 |
| 9 | 115 |
| 10 | 2071 |
| 11 | 6249 |
| 12 | 13669 |
| 13 | 14215 |
| 14 | 14625 |
| 15 | 396127 |