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 | 0 |
| 2 | 0 |
| 3 | 4 |
| 4 | -8 |
| 5 | 4 |
| 6 | -14 |
| 7 | 14 |
| 8 | 14 |
| 9 | -14 |
| 10 | 106 |
| 11 | -192 |
| 12 | 172 |
| 13 | -192 |
| 14 | 106 |
| 15 | -944 |
| 16 | 1664 |
| 17 | -720 |
| 18 | -720 |
| 19 | 1664 |
| 20 | -944 |
| 21 | 10396 |
| 22 | -19560 |
| 23 | 12644 |
| 24 | -6960 |
| 25 | 12644 |
| 26 | -19560 |
| 27 | 10396 |
| 28 | -135134 |
| 29 | 264158 |
| 30 | -176358 |
| 31 | 47334 |
| 32 | 47334 |
| 33 | -176358 |
| 34 | 264158 |
| 35 | -135134 |
| 36 | 2027026 |
| 37 | -4098304 |
| 38 | 2925880 |