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 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 9 |
| 5 | 18 |
| 6 | 38 |
| 7 | 78 |
| 8 | 163 |
| 9 | 338 |
| 10 | 703 |
| 11 | 1458 |
| 12 | 3031 |
| 13 | 6293 |
| 14 | 13073 |
| 15 | 27150 |
| 16 | 56396 |
| 17 | 117130 |
| 18 | 243289 |
| 19 | 505310 |
| 20 | 1049552 |
| 21 | 2179938 |
| 22 | 4527804 |
| 23 | 9404355 |
| 24 | 19533126 |
| 25 | 40570816 |
| 26 | 84266725 |
| 27 | 175024267 |
| 28 | 363530253 |
| 29 | 755062265 |
| 30 | 1568285122 |
| 31 | 3257371187 |
| 32 | 6765649491 |
| 33 | 14052439669 |