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 | 0 |
| 4 | 1 |
| 5 | -1 |
| 6 | 1 |
| 7 | -1 |
| 8 | 1 |
| 9 | 0 |
| 10 | -1 |
| 11 | 1 |
| 12 | -1 |
| 13 | 0 |
| 14 | 0 |
| 15 | 1 |
| 16 | 1 |
| 17 | -3 |
| 18 | 3 |
| 19 | -3 |
| 20 | 0 |
| 21 | 4 |
| 22 | -6 |
| 23 | 6 |
| 24 | -5 |
| 25 | 5 |
| 26 | -1 |
| 27 | -7 |
| 28 | 13 |
| 29 | -16 |
| 30 | 15 |
| 31 | -8 |
| 32 | -3 |
| 33 | 12 |
| 34 | -25 |
| 35 | 41 |
| 36 | -40 |
| 37 | 21 |
| 38 | 10 |
| 39 | -51 |
| 40 | 83 |
| 41 | -93 |
| 42 | 81 |
| 43 | -38 |
| 44 | -44 |
| 45 | 148 |
| 46 | -234 |
| 47 | 258 |
| 48 | -190 |
| 49 | 35 |
| 50 | 184 |
| 51 | -429 |
| 52 | 616 |
| 53 | -660 |
| 54 | 480 |
| 55 | -18 |
| 56 | -640 |
| 57 | 1289 |
| 58 | -1714 |
| 59 | 1693 |
| 60 | -1039 |
| 61 | -268 |