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 | -1 |
| 6 | 1 |
| 7 | 1 |
| 8 | -3 |
| 9 | 3 |
| 10 | -1 |
| 11 | 1 |
| 12 | -5 |
| 13 | 8 |
| 14 | -5 |
| 15 | 1 |
| 16 | 1 |
| 17 | -7 |
| 18 | 16 |
| 19 | -16 |
| 20 | 7 |
| 21 | -1 |
| 22 | 1 |
| 23 | -9 |
| 24 | 27 |
| 25 | -38 |
| 26 | 27 |
| 27 | -9 |
| 28 | 1 |
| 29 | 1 |
| 30 | -11 |
| 31 | 41 |
| 32 | -75 |
| 33 | 75 |
| 34 | -41 |
| 35 | 11 |
| 36 | -1 |
| 37 | 1 |
| 38 | -13 |
| 39 | 58 |
| 40 | -131 |
| 41 | 170 |
| 42 | -131 |
| 43 | 58 |
| 44 | -13 |
| 45 | 1 |
| 46 | 1 |
| 47 | -15 |
| 48 | 78 |
| 49 | -210 |
| 50 | 336 |
| 51 | -336 |
| 52 | 210 |
| 53 | -78 |
| 54 | 15 |
| 55 | -1 |
| 56 | 1 |
| 57 | -17 |
| 58 | 101 |
| 59 | -316 |
| 60 | 602 |
| 61 | -742 |
| 62 | 602 |
| 63 | -316 |
| 64 | 101 |
| 65 | -17 |
| 66 | 1 |