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 | 2 |
| 2 | 2 |
| 3 | 8 |
| 4 | 14 |
| 5 | 38 |
| 6 | 80 |
| 7 | 194 |
| 8 | 434 |
| 9 | 1016 |
| 10 | 2318 |
| 11 | 5366 |
| 12 | 12320 |
| 13 | 28418 |
| 14 | 65378 |
| 15 | 150632 |
| 16 | 346766 |
| 17 | 798662 |
| 18 | 1838960 |
| 19 | 4234946 |
| 20 | 9751826 |
| 21 | 22456664 |
| 22 | 51712142 |
| 23 | 119082134 |
| 24 | 274218560 |
| 25 | 631464962 |
| 26 | 1454120642 |
| 27 | 3348515528 |
| 28 | 7710877454 |
| 29 | 17756424038 |
| 30 | 40889056400 |