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 | 2 |
| 1 | 6 |
| 2 | 6 |
| 3 | 6 |
| 4 | 6 |
| 5 | 6 |
| 6 | -2 |
| 7 | 6 |
| 8 | 2 |
| 9 | -2 |
| 10 | 2 |
| 11 | 6 |
| 12 | 6 |
| 13 | -6 |
| 14 | -6 |
| 15 | -18 |
| 16 | -18 |
| 17 | -14 |
| 18 | -14 |
| 19 | -18 |
| 20 | -18 |
| 21 | -22 |