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 | 2 |
| 1 | 3 |
| 2 | 9 |
| 3 | 22 |
| 4 | 51 |
| 5 | 111 |
| 6 | 234 |
| 7 | 477 |
| 8 | 951 |
| 9 | 1858 |
| 10 | 3573 |
| 11 | 6777 |
| 12 | 12706 |
| 13 | 23583 |
| 14 | 43389 |
| 15 | 79214 |
| 16 | 143631 |
| 17 | 258843 |
| 18 | 463914 |
| 19 | 827337 |
| 20 | 1468827 |
| 21 | 2597018 |
| 22 | 4574529 |
| 23 | 8030037 |
| 24 | 14050946 |
| 25 | 24514011 |
| 26 | 42651729 |
| 27 | 74021062 |
| 28 | 128157771 |
| 29 | 221397543 |
| 30 | 381680298 |
| 31 | 656721237 |
| 32 | 1127890911 |
| 33 | 1933765618 |