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 | 29 |
| 9 | -4 |
| 10 | -3 |
| 11 | -2 |
| 12 | 83 |
| 13 | 27 |
| 14 | 43 |
| 15 | -1 |
| 16 | 45 |
| 17 | -3 |
| 18 | -7 |
| 19 | 39 |
| 20 | -3 |
| 21 | -2 |
| 22 | -1 |
| 23 | -5 |
| 24 | 27 |
| 25 | -3 |
| 26 | 71 |
| 27 | 39 |
| 28 | -3 |
| 29 | -2 |
| 30 | 83 |
| 31 | -3 |
| 32 | 197 |
| 33 | -13 |
| 34 | 281 |
| 35 | -2 |
| 36 | -11 |
| 37 | 83 |