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 | 3 |
| 2 | 2 |
| 3 | 21 |
| 4 | 24 |
| 5 | 8 |
| 6 | 885 |
| 7 | 2016 |
| 8 | 1824 |
| 9 | 768 |
| 10 | 128 |
| 11 | 1566453 |
| 12 | 7136640 |
| 13 | 14585472 |
| 14 | 17427456 |
| 15 | 13300224 |
| 16 | 6635520 |
| 17 | 2113536 |
| 18 | 393216 |
| 19 | 32768 |
| 20 | 4907550002421 |
| 21 | 44716844551680 |
| 22 | 193253086462464 |
| 23 | 525562214510592 |
| 24 | 1006302608418816 |
| 25 | 1438003249348608 |
| 26 | 1586056913289216 |