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 | 3 |
| 3 | 4 |
| 4 | 8 |
| 5 | 12 |
| 6 | 20 |
| 7 | 32 |
| 8 | 54 |
| 9 | 94 |
| 10 | 170 |
| 11 | 297 |
| 12 | 549 |
| 13 | 1017 |
| 14 | 1895 |
| 15 | 3505 |
| 16 | 6577 |
| 17 | 12388 |
| 18 | 23565 |
| 19 | 44891 |
| 20 | 85922 |
| 21 | 164299 |
| 22 | 314173 |
| 23 | 602624 |
| 24 | 1158231 |
| 25 | 2232286 |