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 | -5 |
| 5 | 1 |
| 6 | 8 |
| 7 | -19 |
| 8 | 9 |
| 9 | 0 |
| 10 | 16 |
| 11 | -65 |
| 12 | 55 |
| 13 | 0 |
| 14 | -6 |
| 15 | 32 |
| 16 | -211 |
| 17 | 285 |
| 18 | 0 |
| 19 | -120 |
| 20 | 30 |
| 21 | 64 |
| 22 | -665 |
| 23 | 1351 |
| 24 | 0 |
| 25 | -1470 |
| 26 | 810 |
| 27 | -90 |
| 28 | 128 |
| 29 | -2059 |
| 30 | 6069 |
| 31 | 0 |
| 32 | -14280 |
| 33 | 13020 |
| 34 | -3150 |
| 35 | 0 |