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 | 2 |
| 3 | -2 |
| 4 | 3 |
| 5 | -3 |
| 6 | 3 |
| 7 | -2 |
| 8 | -1 |
| 9 | 5 |
| 10 | -13 |
| 11 | 22 |
| 12 | -36 |
| 13 | 51 |
| 14 | -68 |
| 15 | 82 |
| 16 | -86 |
| 17 | 75 |
| 18 | -31 |
| 19 | -52 |
| 20 | 201 |
| 21 | -421 |
| 22 | 732 |
| 23 | -1125 |
| 24 | 1575 |
| 25 | -2024 |
| 26 | 2344 |
| 27 | -2370 |
| 28 | 1807 |
| 29 | -327 |
| 30 | -2532 |
| 31 | 7210 |
| 32 | -14128 |
| 33 | 23486 |
| 34 | -35027 |
| 35 | 47799 |
| 36 | -59594 |
| 37 | 66717 |
| 38 | -63246 |
| 39 | 41012 |
| 40 | 10696 |
| 41 | -104335 |
| 42 | 252653 |
| 43 | -465825 |
| 44 | 746343 |