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 | 0 |
| 2 | -4 |
| 3 | 4 |
| 4 | -4 |
| 5 | 4 |
| 6 | -4 |
| 7 | 8 |
| 8 | -4 |
| 9 | 0 |
| 10 | -4 |
| 11 | 8 |
| 12 | -4 |
| 13 | 0 |
| 14 | -4 |
| 15 | 4 |
| 16 | -4 |
| 17 | 0 |
| 18 | 0 |
| 19 | 8 |
| 20 | -4 |
| 21 | -4 |
| 22 | -4 |
| 23 | 8 |
| 24 | 0 |
| 25 | 0 |
| 26 | 0 |
| 27 | 4 |
| 28 | -4 |
| 29 | 0 |
| 30 | -4 |
| 31 | 8 |
| 32 | -4 |
| 33 | -4 |
| 34 | 0 |