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 | -4 |
| 2 | 2 |
| 3 | 0 |
| 4 | 23 |
| 5 | -20 |
| 6 | 2 |
| 7 | -88 |
| 8 | 63 |
| 9 | -96 |
| 10 | 318 |
| 11 | -104 |
| 12 | 626 |
| 13 | -844 |
| 14 | 504 |
| 15 | -2472 |
| 16 | 1525 |
| 17 | -3704 |
| 18 | 6184 |
| 19 | -4288 |
| 20 | 15284 |
| 21 | -10736 |
| 22 | 23254 |
| 23 | -35792 |
| 24 | 30228 |
| 25 | -84544 |
| 26 | 60974 |
| 27 | -139240 |
| 28 | 176658 |
| 29 | -190108 |
| 30 | 418940 |
| 31 | -320976 |
| 32 | 755332 |
| 33 | -773524 |
| 34 | 1111678 |
| 35 | -1847304 |
| 36 | 1669046 |
| 37 | -3634296 |