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 | -2 |
| 2 | -1 |
| 3 | 2 |
| 4 | 1 |
| 5 | 4 |
| 6 | -6 |
| 7 | -2 |
| 8 | 2 |
| 9 | 0 |
| 10 | 10 |
| 11 | -14 |
| 12 | -5 |
| 13 | 8 |
| 14 | 4 |
| 15 | 20 |
| 16 | -28 |
| 17 | -10 |
| 18 | 14 |
| 19 | 4 |
| 20 | 39 |
| 21 | -56 |
| 22 | -20 |
| 23 | 28 |
| 24 | 10 |
| 25 | 72 |
| 26 | -100 |
| 27 | -34 |
| 28 | 46 |
| 29 | 16 |
| 30 | 128 |
| 31 | -176 |
| 32 | -61 |
| 33 | 86 |
| 34 | 30 |
| 35 | 216 |
| 36 | -294 |
| 37 | -100 |
| 38 | 134 |
| 39 | 44 |
| 40 | 355 |
| 41 | -484 |
| 42 | -165 |
| 43 | 226 |
| 44 | 79 |
| 45 | 568 |
| 46 | -770 |
| 47 | -260 |
| 48 | 350 |
| 49 | 116 |
| 50 | 894 |
| 51 | -1208 |
| 52 | -408 |
| 53 | 552 |
| 54 | 188 |
| 55 | 1376 |
| 56 | -1848 |
| 57 | -620 |
| 58 | 830 |
| 59 | 276 |
| 60 | 2087 |
| 61 | -2800 |
| 62 | -940 |