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 | -1 |
| 3 | -6 |
| 4 | 6 |
| 5 | 7 |
| 6 | 9 |
| 7 | -8 |
| 8 | -15 |
| 9 | 13 |
| 10 | -19 |
| 11 | -4 |
| 12 | -49 |
| 13 | 57 |
| 14 | 61 |
| 15 | 32 |
| 16 | -14 |
| 17 | -75 |
| 18 | 47 |
| 19 | -98 |
| 20 | -23 |
| 21 | -124 |
| 22 | 130 |
| 23 | 152 |
| 24 | 116 |
| 25 | -37 |
| 26 | -182 |
| 27 | 96 |
| 28 | -168 |
| 29 | 0 |
| 30 | -335 |
| 31 | 352 |
| 32 | 342 |
| 33 | 196 |
| 34 | -117 |
| 35 | -390 |
| 36 | 230 |
| 37 | -440 |
| 38 | -107 |
| 39 | -600 |
| 40 | 637 |
| 41 | 671 |
| 42 | 480 |
| 43 | -184 |
| 44 | -704 |
| 45 | 469 |
| 46 | -727 |
| 47 | -112 |
| 48 | -1235 |
| 49 | 1241 |
| 50 | 1291 |
| 51 | 722 |
| 52 | -341 |