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 | 2 |
| 2 | -1 |
| 3 | 6 |
| 4 | -3 |
| 5 | -2 |
| 6 | 30 |
| 7 | -15 |
| 8 | -10 |
| 9 | -6 |
| 10 | 42 |
| 11 | -21 |
| 12 | -14 |
| 13 | -6 |
| 14 | 30 |
| 15 | -15 |
| 16 | -10 |
| 17 | -6 |
| 18 | 66 |
| 19 | -33 |
| 20 | -22 |
| 21 | -6 |
| 22 | 2730 |
| 23 | -1365 |
| 24 | -910 |
| 25 | -546 |
| 26 | -390 |
| 27 | -210 |
| 28 | 12 |
| 29 | -3 |
| 30 | -2 |
| 31 | -3060 |
| 32 | -255 |
| 33 | -170 |
| 34 | -102 |
| 35 | -30 |
| 36 | 44688 |
| 37 | -399 |
| 38 | -266 |
| 39 | -114 |
| 40 | -42 |