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) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 1 |
| 5 | 1 |
| 6 | 25 |
| 7 | 139 |
| 8 | 289 |
| 9 | 31 |
| 10 | 1 |
| 11 | 16096 |
| 12 | 49 |
| 13 | 7424 |
| 14 | 588665 |
| 15 | 619115 |
| 16 | 83521 |
| 17 | 8000000 |
| 18 | 1515625 |
| 19 | 505620842 |
| 20 | 17643776 |
| 21 | 244140625 |
| 22 | 5443635008 |