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 | -3 |
| 4 | -1 |
| 5 | 5 |
| 6 | 5 |
| 7 | -5 |
| 8 | -13 |
| 9 | -2 |
| 10 | 21 |
| 11 | 20 |
| 12 | -18 |
| 13 | -46 |
| 14 | -8 |
| 15 | 66 |
| 16 | 62 |
| 17 | -54 |
| 18 | -135 |
| 19 | -21 |
| 20 | 188 |
| 21 | 172 |
| 22 | -147 |
| 23 | -361 |
| 24 | -57 |
| 25 | 479 |
| 26 | 433 |
| 27 | -364 |
| 28 | -882 |
| 29 | -133 |
| 30 | 1147 |
| 31 | 1024 |
| 32 | -850 |
| 33 | -2039 |
| 34 | -309 |
| 35 | 2583 |
| 36 | 2286 |
| 37 | -1880 |
| 38 | -4466 |
| 39 | -662 |
| 40 | 5573 |
| 41 | 4889 |
| 42 | -3987 |
| 43 | -9403 |
| 44 | -1392 |
| 45 | 11541 |
| 46 | 10059 |
| 47 | -8147 |
| 48 | -19087 |
| 49 | -2794 |