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 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 8 |
| 6 | 18 |
| 7 | 39 |
| 8 | 94 |
| 9 | 222 |
| 10 | 572 |
| 11 | 1463 |
| 12 | 3934 |
| 13 | 10584 |
| 14 | 29211 |
| 15 | 80808 |
| 16 | 226430 |
| 17 | 636320 |
| 18 | 1800318 |
| 19 | 5107479 |
| 20 | 14548360 |
| 21 | 41538874 |
| 22 | 118927919 |
| 23 | 341187047 |
| 24 | 980838750 |
| 25 | 2824561080 |
| 26 | 8147547156 |
| 27 | 23536592010 |
| 28 | 68087313892 |
| 29 | 197216119544 |
| 30 | 571924673368 |
| 31 | 1660419530055 |
| 32 | 4825587979390 |