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 | -1 |
| 2 | 1 |
| 3 | 1 |
| 4 | -2 |
| 5 | 1 |
| 6 | -3 |
| 7 | 5 |
| 8 | -3 |
| 9 | 1 |
| 10 | 17 |
| 11 | -28 |
| 12 | 14 |
| 13 | -4 |
| 14 | 1 |
| 15 | -155 |
| 16 | 255 |
| 17 | -126 |
| 18 | 30 |
| 19 | -5 |
| 20 | 1 |
| 21 | 2073 |
| 22 | -3410 |
| 23 | 1683 |
| 24 | -396 |
| 25 | 55 |
| 26 | -6 |
| 27 | 1 |
| 28 | -38227 |
| 29 | 62881 |
| 30 | -31031 |
| 31 | 7293 |
| 32 | -1001 |
| 33 | 91 |
| 34 | -7 |
| 35 | 1 |
| 36 | 929569 |
| 37 | -1529080 |
| 38 | 754572 |
| 39 | -177320 |
| 40 | 24310 |
| 41 | -2184 |
| 42 | 140 |
| 43 | -8 |
| 44 | 1 |
| 45 | -28820619 |