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 | -1 |
| 3 | -1 |
| 4 | 0 |
| 5 | 1 |
| 6 | 2 |
| 7 | 0 |
| 8 | -3 |
| 9 | -3 |
| 10 | 2 |
| 11 | 5 |
| 12 | 4 |
| 13 | -4 |
| 14 | -10 |
| 15 | -5 |
| 16 | 10 |
| 17 | 16 |
| 18 | 5 |
| 19 | -20 |
| 20 | -27 |
| 21 | 0 |
| 22 | 41 |
| 23 | 38 |
| 24 | -14 |
| 25 | -73 |
| 26 | -55 |
| 27 | 46 |
| 28 | 134 |
| 29 | 63 |
| 30 | -118 |
| 31 | -219 |
| 32 | -55 |
| 33 | 252 |
| 34 | 356 |
| 35 | -11 |
| 36 | -510 |
| 37 | -527 |
| 38 | 198 |
| 39 | 951 |
| 40 | 734 |
| 41 | -644 |
| 42 | -1702 |
| 43 | -867 |
| 44 | 1579 |
| 45 | 2864 |
| 46 | 764 |
| 47 | -3415 |
| 48 | -4609 |
| 49 | 84 |
| 50 | 6808 |
| 51 | 6897 |
| 52 | -2526 |
| 53 | -12745 |
| 54 | -9539 |
| 55 | 8383 |