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 | 14 |
| 3 | 53 |
| 4 | 109 |
| 5 | 221 |
| 6 | 445 |
| 7 | 893 |
| 8 | 1789 |
| 9 | 3581 |
| 10 | 7165 |
| 11 | 14333 |
| 12 | 28669 |
| 13 | 84530 |
| 14 | 295033 |
| 15 | 830369 |
| 16 | 1660741 |
| 17 | 4755764 |
| 18 | 10372048 |
| 19 | 28287409 |
| 20 | 56574821 |
| 21 | 153253317 |
| 22 | 323636916 |
| 23 | 848150626 |
| 24 | 2217511139 |
| 25 | 6534867338 |
| 26 | 20173498129 |
| 27 | 40346996261 |
| 28 | 120496984345 |