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 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | -1 |
| 5 | 1 |
| 6 | 1 |
| 7 | -1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 3 |
| 11 | -23 |
| 12 | 29 |
| 13 | -25 |
| 14 | 1 |
| 15 | 11 |
| 16 | -79 |
| 17 | 131 |
| 18 | -353 |
| 19 | 403 |
| 20 | 1 |
| 21 | 53 |
| 22 | -1237 |
| 23 | 4031 |
| 24 | -3451 |
| 25 | 3101 |
| 26 | -749 |
| 27 | 1 |
| 28 | 103 |
| 29 | -5297 |
| 30 | 14213 |
| 31 | -34903 |
| 32 | 126121 |
| 33 | -101297 |
| 34 | 31837 |
| 35 | 1 |
| 36 | 2199 |
| 37 | -100123 |
| 38 | 106657 |
| 39 | -119129 |
| 40 | 1438599 |
| 41 | -6199951 |
| 42 | 6112397 |
| 43 | -455481 |
| 44 | 1 |