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 | 4 |
| 3 | 4 |
| 4 | 10 |
| 5 | 22 |
| 6 | 34 |
| 7 | 66 |
| 8 | 138 |
| 9 | 250 |
| 10 | 472 |
| 11 | 944 |
| 12 | 1806 |
| 13 | 3450 |
| 14 | 6772 |
| 15 | 13172 |
| 16 | 25478 |
| 17 | 49794 |
| 18 | 97348 |
| 19 | 189772 |
| 20 | 371246 |
| 21 | 727506 |
| 22 | 1424586 |
| 23 | 2793034 |
| 24 | 5483342 |
| 25 | 10766950 |
| 26 | 21154424 |
| 27 | 41599648 |
| 28 | 81840866 |
| 29 | 161080918 |
| 30 | 317230034 |
| 31 | 625030514 |
| 32 | 1231964394 |
| 33 | 2429323642 |