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 | -1 |
| 5 | 2 |
| 6 | 6 |
| 7 | 11 |
| 8 | 15 |
| 9 | 16 |
| 10 | 11 |
| 11 | -2 |
| 12 | -26 |
| 13 | -61 |
| 14 | -105 |
| 15 | -152 |
| 16 | -192 |
| 17 | -209 |
| 18 | -183 |
| 19 | -89 |
| 20 | 98 |
| 21 | 400 |
| 22 | 830 |
| 23 | 1385 |
| 24 | 2035 |
| 25 | 2715 |
| 26 | 3314 |
| 27 | 3668 |
| 28 | 3556 |
| 29 | 2703 |
| 30 | 790 |
| 31 | -2521 |
| 32 | -7550 |
| 33 | -14542 |
| 34 | -23591 |
| 35 | -34546 |
| 36 | -46901 |
| 37 | -59670 |
| 38 | -71261 |
| 39 | -79358 |
| 40 | -80830 |
| 41 | -71690 |
| 42 | -47133 |
| 43 | -1684 |
| 44 | 70504 |
| 45 | 175168 |
| 46 | 317232 |