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 | 1 |
| 2 | 3 |
| 3 | 9 |
| 4 | 19 |
| 5 | 46 |
| 6 | 93 |
| 7 | 189 |
| 8 | 379 |
| 9 | 782 |
| 10 | 1565 |
| 11 | 3133 |
| 12 | 6267 |
| 13 | 12542 |
| 14 | 25085 |
| 15 | 50173 |
| 16 | 100347 |
| 17 | 200761 |
| 18 | 401523 |
| 19 | 803049 |
| 20 | 1606099 |
| 21 | 3212206 |
| 22 | 6424413 |
| 23 | 12848829 |
| 24 | 25697659 |
| 25 | 51395342 |
| 26 | 102790685 |
| 27 | 205581373 |
| 28 | 411162747 |
| 29 | 822325502 |
| 30 | 1644651005 |
| 31 | 3289302013 |
| 32 | 6578604027 |
| 33 | 13157208249 |