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 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 11 |
| 5 | 24 |
| 6 | 51 |
| 7 | 108 |
| 8 | 226 |
| 9 | 471 |
| 10 | 976 |
| 11 | 2015 |
| 12 | 4146 |
| 13 | 8508 |
| 14 | 17418 |
| 15 | 35590 |
| 16 | 72597 |
| 17 | 147868 |
| 18 | 300797 |
| 19 | 611202 |
| 20 | 1240690 |
| 21 | 2516268 |
| 22 | 5099242 |
| 23 | 10326282 |
| 24 | 20897848 |
| 25 | 42267257 |
| 26 | 85442478 |
| 27 | 172635651 |
| 28 | 348651294 |
| 29 | 703836046 |
| 30 | 1420315254 |
| 31 | 2865122304 |
| 32 | 5777735296 |
| 33 | 11647641296 |