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 | 1 |
| 4 | -13 |
| 5 | 1 |
| 6 | 1 |
| 7 | 183 |
| 8 | 183 |
| 9 | 1 |
| 10 | 1 |
| 11 | -2561 |
| 12 | 36051 |
| 13 | -2561 |
| 14 | 1 |
| 15 | 1 |
| 16 | 35855 |
| 17 | 7063435 |
| 18 | 7063435 |
| 19 | 35855 |
| 20 | 1 |
| 21 | 1 |
| 22 | -501969 |
| 23 | 1384469115 |
| 24 | -19375002205 |
| 25 | 1384469115 |
| 26 | -501969 |
| 27 | 1 |
| 28 | 1 |
| 29 | 7027567 |
| 30 | 271355444571 |
| 31 | 53166390519635 |
| 32 | 53166390519635 |
| 33 | 271355444571 |