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 | 1 |
| 4 | 1 |
| 5 | 0 |
| 6 | 1 |
| 7 | -1 |
| 8 | 1 |
| 9 | -1 |
| 10 | 0 |
| 11 | 1 |
| 12 | 1 |
| 13 | -1 |
| 14 | 1 |
| 15 | -2 |
| 16 | -1 |
| 17 | 3 |
| 18 | 5 |
| 19 | -1 |
| 20 | -2 |
| 21 | 7 |
| 22 | -3 |
| 23 | -13 |
| 24 | 97 |
| 25 | 200 |
| 26 | 2309 |
| 27 | -226573 |
| 28 | 45538573 |
| 29 | -105193879657 |
| 30 | -23833987746960404 |
| 31 | 1085365814730154781188953 |
| 32 | 114173840897460294190477827374165629 |