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 | -1 |
| 4 | 1 |
| 5 | -1 |
| 6 | 1 |
| 7 | -1 |
| 8 | 1 |
| 9 | 0 |
| 10 | 0 |
| 11 | 1 |
| 12 | -1 |
| 13 | 2 |
| 14 | -3 |
| 15 | 3 |
| 16 | -4 |
| 17 | 4 |
| 18 | -2 |
| 19 | 1 |
| 20 | -1 |
| 21 | -3 |
| 22 | 8 |
| 23 | -11 |
| 24 | 13 |
| 25 | -19 |
| 26 | 25 |
| 27 | -26 |
| 28 | 26 |
| 29 | -26 |
| 30 | 22 |
| 31 | -12 |
| 32 | -2 |
| 33 | 18 |
| 34 | -38 |
| 35 | 63 |
| 36 | -88 |
| 37 | 112 |
| 38 | -135 |
| 39 | 147 |
| 40 | -143 |
| 41 | 127 |
| 42 | -98 |
| 43 | 35 |
| 44 | 64 |
| 45 | -167 |
| 46 | 290 |
| 47 | -447 |
| 48 | 605 |
| 49 | -735 |
| 50 | 829 |
| 51 | -886 |
| 52 | 864 |
| 53 | -712 |
| 54 | 433 |
| 55 | -23 |
| 56 | -542 |
| 57 | 1259 |
| 58 | -2084 |
| 59 | 2964 |