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 | 1 |
| 3 | 0 |
| 4 | 1 |
| 5 | 0 |
| 6 | 0 |
| 7 | 1 |
| 8 | 0 |
| 9 | 0 |
| 10 | 1 |
| 11 | -1 |
| 12 | 1 |
| 13 | 1 |
| 14 | -2 |
| 15 | 3 |
| 16 | -1 |
| 17 | -3 |
| 18 | 8 |
| 19 | -8 |
| 20 | 1 |
| 21 | 14 |
| 22 | -26 |
| 23 | 22 |
| 24 | 10 |
| 25 | -59 |
| 26 | 90 |
| 27 | -52 |
| 28 | -74 |
| 29 | 238 |
| 30 | -291 |
| 31 | 80 |
| 32 | 417 |
| 33 | -930 |
| 34 | 915 |
| 35 | 124 |
| 36 | -1991 |
| 37 | 3483 |
| 38 | -2533 |
| 39 | -2148 |
| 40 | 9011 |
| 41 | -12596 |
| 42 | 5754 |
| 43 | 14350 |
| 44 | -37975 |
| 45 | 42735 |
| 46 | -4046 |
| 47 | -77924 |
| 48 | 154374 |
| 49 | -133903 |
| 50 | -56529 |
| 51 | 376844 |
| 52 | -591197 |
| 53 | 355941 |
| 54 | 522978 |
| 55 | -1706239 |