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 | 15 |
| 2 | 145 |
| 3 | 149 |
| 4 | 243 |
| 5 | 259 |
| 6 | 449 |
| 7 | 1921 |
| 8 | 2787 |
| 9 | 15871 |
| 10 | 18563 |
| 11 | 26459 |
| 12 | 191515 |
| 13 | 283269 |
| 14 | 741343 |
| 15 | 844805 |