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 | 1 |
| 2 | 3 |
| 3 | 15 |
| 4 | 81 |
| 5 | 327 |
| 6 | 357 |
| 7 | 685 |
| 8 | 831 |
| 9 | 861 |
| 10 | 1405 |
| 11 | 38571 |
| 12 | 78127 |
| 13 | 216487 |
| 14 | 546121 |
| 15 | 622615 |