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 | 9 |
| 4 | 26 |
| 5 | 68 |
| 6 | 198 |
| 7 | 536 |
| 8 | 1660 |
| 9 | 4769 |
| 10 | 15945 |
| 11 | 46240 |
| 12 | 165732 |
| 13 | 488268 |
| 14 | 1848866 |
| 15 | 5852344 |