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) |
|---|---|
| 1 | 1 |
| 2 | -1 |
| 3 | 1 |
| 4 | -11 |
| 5 | 1 |
| 6 | 1 |
| 7 | -46 |
| 8 | 37 |
| 9 | -1 |
| 10 | 1 |
| 11 | -181 |
| 12 | 298 |
| 13 | -112 |
| 14 | 1 |
| 15 | 1 |
| 16 | -716 |
| 17 | 1784 |
| 18 | -1368 |
| 19 | 308 |
| 20 | -1 |
| 21 | 1 |
| 22 | -2851 |
| 23 | 9495 |
| 24 | -11119 |
| 25 | 5286 |
| 26 | -828 |
| 27 | 1 |
| 28 | 1 |
| 29 | -11386 |
| 30 | 47431 |
| 31 | -74940 |
| 32 | 55235 |
| 33 | -18546 |
| 34 | 2189 |
| 35 | -1 |
| 36 | 1 |
| 37 | -45521 |
| 38 | 227592 |
| 39 | -453206 |
| 40 | 455080 |
| 41 | -239360 |
| 42 | 61185 |
| 43 | -5759 |