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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 1 |
| 9 | 7 |
| 10 | 37 |
| 11 | 154 |
| 12 | 558 |
| 13 | 1830 |
| 14 | 5581 |
| 15 | 16077 |
| 16 | 44251 |
| 17 | 117308 |
| 18 | 301330 |
| 19 | 753458 |
| 20 | 1840568 |
| 21 | 4405344 |
| 22 | 10355493 |
| 23 | 23953832 |
| 24 | 54614151 |
| 25 | 122903818 |
| 26 | 273320540 |
| 27 | 601273377 |
| 28 | 1309641376 |
| 29 | 2826528077 |
| 30 | 6048868456 |
| 31 | 12843409063 |
| 32 | 27071247989 |