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 | 2 |
| 4 | -1 |
| 5 | -4 |
| 6 | 1 |
| 7 | 5 |
| 8 | -2 |
| 9 | -5 |
| 10 | 4 |
| 11 | 7 |
| 12 | -4 |
| 13 | -11 |
| 14 | 3 |
| 15 | 13 |
| 16 | -6 |
| 17 | -14 |
| 18 | 9 |
| 19 | 18 |
| 20 | -7 |
| 21 | -24 |
| 22 | 8 |
| 23 | 29 |
| 24 | -14 |
| 25 | -32 |
| 26 | 17 |
| 27 | 38 |
| 28 | -18 |
| 29 | -50 |
| 30 | 20 |
| 31 | 58 |
| 32 | -25 |
| 33 | -63 |
| 34 | 33 |
| 35 | 77 |
| 36 | -35 |
| 37 | -94 |
| 38 | 36 |
| 39 | 108 |
| 40 | -48 |
| 41 | -122 |
| 42 | 60 |
| 43 | 141 |
| 44 | -63 |
| 45 | -170 |
| 46 | 70 |
| 47 | 195 |
| 48 | -87 |
| 49 | -215 |
| 50 | 101 |
| 51 | 250 |
| 52 | -110 |
| 53 | -294 |
| 54 | 124 |
| 55 | 333 |
| 56 | -146 |
| 57 | -371 |
| 58 | 173 |
| 59 | 424 |
| 60 | -190 |
| 61 | -492 |
| 62 | 206 |
| 63 | 554 |
| 64 | -245 |
| 65 | -617 |
| 66 | 283 |