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) |
|---|---|
| 1 | 1 |
| 2 | -7 |
| 3 | -34 |
| 4 | -34 |
| 5 | -159 |
| 6 | 57 |
| 7 | -286 |
| 8 | -286 |
| 9 | -286 |
| 10 | 714 |
| 11 | -617 |
| 12 | -617 |
| 13 | -2814 |
| 14 | -70 |
| 15 | 3305 |
| 16 | 3305 |
| 17 | -1608 |
| 18 | -1608 |
| 19 | -8467 |
| 20 | -8467 |
| 21 | 794 |
| 22 | 11442 |
| 23 | -725 |
| 24 | -725 |
| 25 | -725 |
| 26 | 16851 |
| 27 | 16851 |
| 28 | 16851 |
| 29 | -7538 |
| 30 | -34538 |
| 31 | -64329 |
| 32 | -64329 |
| 33 | -28392 |
| 34 | 10912 |
| 35 | 53787 |
| 36 | 53787 |
| 37 | 3134 |
| 38 | 58006 |
| 39 | 117325 |
| 40 | 117325 |
| 41 | 48404 |