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 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 8 |
| 6 | 18 |
| 7 | 31 |
| 8 | 71 |
| 9 | 126 |
| 10 | 290 |
| 11 | 527 |
| 12 | 1218 |
| 13 | 2253 |
| 14 | 5223 |
| 15 | 9796 |
| 16 | 22763 |
| 17 | 43170 |
| 18 | 100502 |
| 19 | 192347 |
| 20 | 448476 |
| 21 | 864887 |
| 22 | 2019121 |
| 23 | 3919162 |
| 24 | 9159252 |
| 25 | 17877619 |
| 26 | 41819003 |
| 27 | 82021628 |
| 28 | 192015633 |