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 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 2 |
| 4 | 0 |
| 5 | -5 |
| 6 | -13 |
| 7 | -21 |
| 8 | -21 |
| 9 | 0 |
| 10 | 55 |
| 11 | 144 |
| 12 | 233 |
| 13 | 233 |
| 14 | 0 |
| 15 | -610 |
| 16 | -1597 |
| 17 | -2584 |
| 18 | -2584 |
| 19 | 0 |
| 20 | 6765 |
| 21 | 17711 |
| 22 | 28657 |
| 23 | 28657 |
| 24 | 0 |
| 25 | -75025 |
| 26 | -196418 |
| 27 | -317811 |
| 28 | -317811 |
| 29 | 0 |
| 30 | 832040 |
| 31 | 2178309 |
| 32 | 3524578 |
| 33 | 3524578 |
| 34 | 0 |
| 35 | -9227465 |
| 36 | -24157817 |
| 37 | -39088169 |
| 38 | -39088169 |
| 39 | 0 |
| 40 | 102334155 |
| 41 | 267914296 |
| 42 | 433494437 |
| 43 | 433494437 |
| 44 | 0 |
| 45 | -1134903170 |