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 | 0 |
| 3 | -2 |
| 4 | 1 |
| 5 | 0 |
| 6 | 4 |
| 7 | 0 |
| 8 | 1 |
| 9 | -7 |
| 10 | -3 |
| 11 | -5 |
| 12 | 10 |
| 13 | 9 |
| 14 | 16 |
| 15 | -9 |
| 16 | -17 |
| 17 | -40 |
| 18 | -6 |
| 19 | 19 |
| 20 | 82 |
| 21 | 54 |
| 22 | 10 |
| 23 | -135 |
| 24 | -161 |
| 25 | -127 |
| 26 | 153 |
| 27 | 340 |
| 28 | 433 |
| 29 | 0 |
| 30 | -527 |
| 31 | -1053 |
| 32 | -620 |
| 33 | 434 |
| 34 | 2013 |
| 35 | 2200 |
| 36 | 712 |
| 37 | -2880 |
| 38 | -5267 |
| 39 | -4491 |
| 40 | 1981 |
| 41 | 9635 |
| 42 | 13350 |
| 43 | 4897 |
| 44 | -12392 |