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 | 2 |
| 2 | 0 |
| 3 | -5 |
| 4 | -8 |
| 5 | 0 |
| 6 | 21 |
| 7 | 34 |
| 8 | 0 |
| 9 | -89 |
| 10 | -144 |
| 11 | 0 |
| 12 | 377 |
| 13 | 610 |
| 14 | 0 |
| 15 | -1597 |
| 16 | -2584 |
| 17 | 0 |
| 18 | 6765 |
| 19 | 10946 |
| 20 | 0 |
| 21 | -28657 |
| 22 | -46368 |
| 23 | 0 |
| 24 | 121393 |
| 25 | 196418 |
| 26 | 0 |
| 27 | -514229 |
| 28 | -832040 |
| 29 | 0 |
| 30 | 2178309 |
| 31 | 3524578 |
| 32 | 0 |
| 33 | -9227465 |
| 34 | -14930352 |
| 35 | 0 |
| 36 | 39088169 |
| 37 | 63245986 |
| 38 | 0 |
| 39 | -165580141 |
| 40 | -267914296 |
| 41 | 0 |