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 | 0 |
| 5 | 3 |
| 6 | 4 |
| 7 | -3 |
| 8 | -8 |
| 9 | 22 |
| 10 | 12 |
| 11 | 6 |
| 12 | 3 |
| 13 | -22 |
| 14 | -62 |
| 15 | 61 |
| 16 | -2 |
| 17 | 68 |
| 18 | -166 |
| 19 | 68 |
| 20 | -14 |
| 21 | -216 |
| 22 | -53 |
| 23 | 196 |
| 24 | -12 |
| 25 | 304 |
| 26 | -15 |
| 27 | -32 |
| 28 | -322 |
| 29 | 24 |
| 30 | 274 |
| 31 | -112 |
| 32 | -294 |
| 33 | 832 |
| 34 | 638 |
| 35 | -213 |
| 36 | 918 |
| 37 | -474 |
| 38 | -570 |
| 39 | -854 |
| 40 | -1227 |
| 41 | -1018 |
| 42 | 3476 |
| 43 | -2038 |
| 44 | 588 |
| 45 | -1382 |
| 46 | 3520 |
| 47 | -578 |
| 48 | -248 |
| 49 | -1314 |
| 50 | -292 |
| 51 | -8825 |