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 | 8 |
| 5 | 16 |
| 6 | 28 |
| 7 | 56 |
| 8 | 108 |
| 9 | 204 |
| 10 | 332 |
| 11 | 664 |
| 12 | 1114 |
| 13 | 2228 |
| 14 | 4078 |
| 15 | 7018 |
| 16 | 11402 |
| 17 | 22804 |
| 18 | 40638 |
| 19 | 81276 |
| 20 | 140490 |
| 21 | 230328 |
| 22 | 391544 |
| 23 | 783088 |
| 24 | 1287034 |
| 25 | 2273676 |
| 26 | 3903626 |
| 27 | 6837760 |
| 28 | 10368184 |
| 29 | 20736368 |
| 30 | 34081198 |
| 31 | 68162396 |