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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 1 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 2 |
| 12 | -1 |
| 13 | 0 |
| 14 | 0 |
| 15 | 0 |
| 16 | 10 |
| 17 | -14 |
| 18 | 5 |
| 19 | 0 |
| 20 | 9 |
| 21 | 34 |
| 22 | -105 |
| 23 | 84 |
| 24 | 8 |
| 25 | 36 |
| 26 | 32 |
| 27 | -572 |
| 28 | 970 |
| 29 | -422 |
| 30 | 66 |
| 31 | -232 |
| 32 | -2340 |
| 33 | 7546 |
| 34 | -7487 |
| 35 | 2482 |
| 36 | -2260 |
| 37 | -6788 |
| 38 | 47860 |
| 39 | -80554 |
| 40 | 53467 |
| 41 | -26496 |
| 42 | 3532 |
| 43 | 247154 |
| 44 | -689752 |
| 45 | 753092 |
| 46 | -423754 |