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 | -3 |
| 5 | 1 |
| 6 | 1 |
| 7 | -6 |
| 8 | 5 |
| 9 | -1 |
| 10 | 1 |
| 11 | -13 |
| 12 | 18 |
| 13 | -8 |
| 14 | 1 |
| 15 | 1 |
| 16 | -24 |
| 17 | 52 |
| 18 | -40 |
| 19 | 12 |
| 20 | -1 |
| 21 | 1 |
| 22 | -39 |
| 23 | 131 |
| 24 | -155 |
| 25 | 78 |
| 26 | -16 |
| 27 | 1 |
| 28 | 1 |
| 29 | -58 |
| 30 | 291 |
| 31 | -508 |
| 32 | 391 |
| 33 | -138 |
| 34 | 21 |
| 35 | -1 |
| 36 | 1 |
| 37 | -81 |
| 38 | 584 |
| 39 | -1410 |
| 40 | 1548 |
| 41 | -840 |
| 42 | 225 |
| 43 | -27 |
| 44 | 1 |
| 45 | 1 |
| 46 | -108 |
| 47 | 1078 |
| 48 | -3448 |
| 49 | 5151 |
| 50 | -4016 |
| 51 | 1658 |
| 52 | -348 |
| 53 | 33 |
| 54 | -1 |
| 55 | 1 |