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) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 0 |
| 4 | 1 |
| 5 | 1 |
| 6 | 0 |
| 7 | -1 |
| 8 | 1 |
| 9 | 2 |
| 10 | -1 |
| 11 | -3 |
| 12 | 2 |
| 13 | 5 |
| 14 | -3 |
| 15 | -8 |
| 16 | 5 |
| 17 | 13 |
| 18 | -8 |
| 19 | -21 |
| 20 | 13 |
| 21 | 34 |
| 22 | -21 |
| 23 | -55 |
| 24 | 34 |
| 25 | 89 |
| 26 | -55 |
| 27 | -144 |
| 28 | 89 |
| 29 | 233 |
| 30 | -144 |
| 31 | -377 |
| 32 | 233 |
| 33 | 610 |
| 34 | -377 |
| 35 | -987 |
| 36 | 610 |
| 37 | 1597 |
| 38 | -987 |
| 39 | -2584 |
| 40 | 1597 |
| 41 | 4181 |
| 42 | -2584 |
| 43 | -6765 |
| 44 | 4181 |
| 45 | 10946 |
| 46 | -6765 |
| 47 | -17711 |
| 48 | 10946 |
| 49 | 28657 |
| 50 | -17711 |
| 51 | -46368 |