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 | 2 |
| 1 | -7 |
| 2 | 0 |
| 3 | 26 |
| 4 | -42 |
| 5 | 63 |
| 6 | -111 |
| 7 | 90 |
| 8 | 54 |
| 9 | -273 |
| 10 | 451 |
| 11 | -396 |
| 12 | 275 |
| 13 | -561 |
| 14 | 1287 |
| 15 | -1781 |
| 16 | 1365 |
| 17 | -351 |
| 18 | -871 |
| 19 | 2938 |
| 20 | -5733 |
| 21 | 7008 |
| 22 | -5172 |
| 23 | 2331 |
| 24 | -1905 |
| 25 | 5835 |
| 26 | -14688 |
| 27 | 24752 |
| 28 | -27455 |
| 29 | 19278 |
| 30 | -7684 |
| 31 | -561 |
| 32 | 10251 |
| 33 | -32317 |
| 34 | 69768 |
| 35 | -104652 |
| 36 | 107407 |
| 37 | -72960 |
| 38 | 31293 |
| 39 | -10621 |
| 40 | 18069 |
| 41 | -63783 |