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 | 2 |
| 2 | 3 |
| 3 | 8 |
| 4 | 16 |
| 5 | 29 |
| 6 | 49 |
| 7 | 82 |
| 8 | 160 |
| 9 | 344 |
| 10 | 676 |
| 11 | 1333 |
| 12 | 2477 |
| 13 | 4563 |
| 14 | 8535 |
| 15 | 17976 |
| 16 | 35810 |
| 17 | 71374 |
| 18 | 135876 |
| 19 | 258898 |
| 20 | 476494 |
| 21 | 981244 |
| 22 | 1962600 |
| 23 | 3942389 |
| 24 | 7647545 |
| 25 | 14879679 |
| 26 | 28109033 |
| 27 | 55334514 |
| 28 | 111234624 |