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 | 1 |
| 2 | -3 |
| 3 | 1 |
| 4 | -5 |
| 5 | 5 |
| 6 | 1 |
| 7 | -7 |
| 8 | 25 |
| 9 | -5 |
| 10 | 1 |
| 11 | -9 |
| 12 | 23 |
| 13 | -35 |
| 14 | 49 |
| 15 | 1 |
| 16 | -11 |
| 17 | 73 |
| 18 | -27 |
| 19 | 112 |
| 20 | -49 |
| 21 | 1 |
| 22 | -13 |
| 23 | 53 |
| 24 | -77 |
| 25 | 629 |
| 26 | -91 |
| 27 | 58 |
| 28 | 1 |
| 29 | -15 |
| 30 | 145 |
| 31 | -130 |
| 32 | 1399 |
| 33 | -451 |
| 34 | 753 |
| 35 | -58 |
| 36 | 1 |
| 37 | -17 |
| 38 | 95 |
| 39 | -135 |
| 40 | 2699 |
| 41 | -2301 |
| 42 | 8573 |
| 43 | -869 |
| 44 | 341 |
| 45 | 1 |
| 46 | -19 |
| 47 | 241 |