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 | 6 |
| 3 | 7 |
| 4 | 18 |
| 5 | 39 |
| 6 | 75 |
| 7 | 155 |
| 8 | 310 |
| 9 | 638 |
| 10 | 1295 |
| 11 | 2624 |
| 12 | 5339 |
| 13 | 10853 |
| 14 | 22069 |
| 15 | 44836 |
| 16 | 91134 |
| 17 | 185259 |
| 18 | 376542 |
| 19 | 765331 |
| 20 | 1555567 |
| 21 | 3161843 |
| 22 | 6426646 |
| 23 | 13062506 |
| 24 | 26550391 |
| 25 | 53965428 |
| 26 | 109688223 |
| 27 | 222948193 |
| 28 | 453156469 |
| 29 | 921069708 |
| 30 | 1872133138 |
| 31 | 3805230243 |
| 32 | 7734373962 |
| 33 | 15720610559 |