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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 8 |
| 5 | 15 |
| 6 | 30 |
| 7 | 59 |
| 8 | 114 |
| 9 | 222 |
| 10 | 434 |
| 11 | 844 |
| 12 | 1641 |
| 13 | 3189 |
| 14 | 6192 |
| 15 | 12020 |
| 16 | 23320 |
| 17 | 45213 |
| 18 | 87624 |
| 19 | 169744 |
| 20 | 328684 |
| 21 | 636221 |
| 22 | 1231067 |
| 23 | 2381269 |
| 24 | 4604713 |
| 25 | 8901664 |