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 | -5 |
| 4 | 9 |
| 5 | -4 |
| 6 | -5 |
| 7 | 12 |
| 8 | -4 |
| 9 | 25 |
| 10 | -15 |
| 11 | 26 |
| 12 | -45 |
| 13 | 58 |
| 14 | -44 |
| 15 | 20 |
| 16 | -4 |
| 17 | 21 |
| 18 | 25 |
| 19 | -6 |
| 20 | 26 |
| 21 | -60 |
| 22 | 82 |
| 23 | -59 |
| 24 | 20 |
| 25 | 5 |
| 26 | 21 |
| 27 | -125 |
| 28 | 153 |
| 29 | -124 |
| 30 | 75 |
| 31 | -44 |
| 32 | 76 |
| 33 | -130 |
| 34 | 164 |
| 35 | -129 |
| 36 | 225 |
| 37 | -188 |
| 38 | 226 |
| 39 | -290 |
| 40 | 330 |
| 41 | -289 |
| 42 | 220 |
| 43 | -177 |
| 44 | 221 |
| 45 | -100 |
| 46 | 146 |
| 47 | -99 |
| 48 | 20 |
| 49 | 29 |
| 50 | 21 |
| 51 | -105 |
| 52 | 157 |
| 53 | -104 |
| 54 | -125 |
| 55 | 180 |
| 56 | -124 |
| 57 | 30 |
| 58 | 28 |
| 59 | 31 |
| 60 | -130 |
| 61 | 191 |
| 62 | -129 |
| 63 | 300 |
| 64 | -236 |
| 65 | 301 |
| 66 | -410 |
| 67 | 477 |
| 68 | -409 |
| 69 | 295 |