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 | 0 |
| 3 | -2 |
| 4 | -3 |
| 5 | 0 |
| 6 | 8 |
| 7 | 13 |
| 8 | 0 |
| 9 | -34 |
| 10 | -55 |
| 11 | 0 |
| 12 | 144 |
| 13 | 233 |
| 14 | 0 |
| 15 | -610 |
| 16 | -987 |
| 17 | 0 |
| 18 | 2584 |
| 19 | 4181 |
| 20 | 0 |
| 21 | -10946 |
| 22 | -17711 |
| 23 | 0 |
| 24 | 46368 |
| 25 | 75025 |
| 26 | 0 |
| 27 | -196418 |
| 28 | -317811 |
| 29 | 0 |
| 30 | 832040 |
| 31 | 1346269 |
| 32 | 0 |
| 33 | -3524578 |
| 34 | -5702887 |
| 35 | 0 |
| 36 | 14930352 |
| 37 | 24157817 |
| 38 | 0 |
| 39 | -63245986 |
| 40 | -102334155 |
| 41 | 0 |