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 | -3 |
| 5 | 1 |
| 6 | 1 |
| 7 | 5 |
| 8 | -5 |
| 9 | 1 |
| 10 | -1 |
| 11 | -6 |
| 12 | 14 |
| 13 | -7 |
| 14 | 1 |
| 15 | 0 |
| 16 | 6 |
| 17 | -29 |
| 18 | 27 |
| 19 | -9 |
| 20 | 1 |
| 21 | 1 |
| 22 | -6 |
| 23 | 50 |
| 24 | -76 |
| 25 | 44 |
| 26 | -11 |
| 27 | 1 |
| 28 | -1 |
| 29 | 7 |
| 30 | -77 |
| 31 | 175 |
| 32 | -155 |
| 33 | 65 |
| 34 | -13 |
| 35 | 1 |
| 36 | 0 |
| 37 | -9 |
| 38 | 111 |
| 39 | -351 |
| 40 | 441 |
| 41 | -274 |
| 42 | 90 |
| 43 | -15 |
| 44 | 1 |
| 45 | 1 |
| 46 | 11 |
| 47 | -154 |
| 48 | 638 |
| 49 | -1078 |
| 50 | 924 |
| 51 | -441 |