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 | 1 |
| 4 | 1 |
| 5 | -2 |
| 6 | 1 |
| 7 | -1 |
| 8 | 4 |
| 9 | -4 |
| 10 | 1 |
| 11 | 0 |
| 12 | -6 |
| 13 | 10 |
| 14 | -5 |
| 15 | 1 |
| 16 | 5 |
| 17 | 1 |
| 18 | -16 |
| 19 | 16 |
| 20 | -7 |
| 21 | 1 |
| 22 | -18 |
| 23 | 38 |
| 24 | -12 |
| 25 | -26 |
| 26 | 25 |
| 27 | -8 |
| 28 | 1 |
| 29 | 27 |
| 30 | -161 |
| 31 | 197 |
| 32 | -45 |
| 33 | -44 |
| 34 | 35 |
| 35 | -10 |
| 36 | 1 |
| 37 | 67 |
| 38 | 211 |
| 39 | -580 |
| 40 | 418 |
| 41 | -82 |
| 42 | -71 |
| 43 | 47 |
| 44 | -11 |
| 45 | 1 |
| 46 | -496 |
| 47 | 1285 |
| 48 | -629 |
| 49 | -782 |
| 50 | 839 |
| 51 | -174 |
| 52 | -91 |
| 53 | 60 |
| 54 | -13 |
| 55 | 1 |
| 56 | 496 |
| 57 | -7131 |
| 58 | 10638 |
| 59 | -3619 |