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 | -2 |
| 2 | 1 |
| 3 | 4 |
| 4 | -4 |
| 5 | 1 |
| 6 | -16 |
| 7 | 16 |
| 8 | -6 |
| 9 | 1 |
| 10 | 80 |
| 11 | -80 |
| 12 | 32 |
| 13 | -8 |
| 14 | 1 |
| 15 | -448 |
| 16 | 448 |
| 17 | -184 |
| 18 | 52 |
| 19 | -10 |
| 20 | 1 |
| 21 | 2688 |
| 22 | -2688 |
| 23 | 1120 |
| 24 | -336 |
| 25 | 76 |
| 26 | -12 |
| 27 | 1 |
| 28 | -16896 |
| 29 | 16896 |
| 30 | -7104 |
| 31 | 2208 |
| 32 | -544 |
| 33 | 104 |
| 34 | -14 |
| 35 | 1 |
| 36 | 109824 |