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 | 6 |
| 3 | -5 |
| 4 | 36 |
| 5 | -45 |
| 6 | 10 |
| 7 | 216 |
| 8 | -360 |
| 9 | 80 |
| 10 | 75 |
| 11 | -10 |
| 12 | 1296 |
| 13 | -2700 |
| 14 | 600 |
| 15 | 1125 |
| 16 | -250 |
| 17 | -75 |
| 18 | 5 |
| 19 | 7776 |
| 20 | -19440 |
| 21 | 4320 |
| 22 | 12150 |
| 23 | -3600 |
| 24 | -1125 |
| 25 | -540 |
| 26 | 225 |
| 27 | 200 |
| 28 | 36 |
| 29 | -1 |
| 30 | 46656 |
| 31 | -136080 |
| 32 | 30240 |
| 33 | 113400 |
| 34 | -37800 |
| 35 | -23625 |
| 36 | 2800 |
| 37 | 5250 |
| 38 | -3780 |
| 39 | 3150 |
| 40 | -350 |
| 41 | 252 |
| 42 | -105 |
| 43 | -7 |