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 | 8 |
| 4 | -4 |
| 5 | 1 |
| 6 | -50 |
| 7 | 24 |
| 8 | -6 |
| 9 | 1 |
| 10 | 416 |
| 11 | -200 |
| 12 | 48 |
| 13 | -8 |
| 14 | 1 |
| 15 | -4322 |
| 16 | 2080 |
| 17 | -500 |
| 18 | 80 |
| 19 | -10 |
| 20 | 1 |
| 21 | 53888 |
| 22 | -25932 |
| 23 | 6240 |
| 24 | -1000 |
| 25 | 120 |
| 26 | -12 |
| 27 | 1 |
| 28 | -783890 |
| 29 | 377216 |
| 30 | -90762 |
| 31 | 14560 |
| 32 | -1750 |
| 33 | 168 |
| 34 | -14 |
| 35 | 1 |
| 36 | 13031936 |
| 37 | -6271120 |
| 38 | 1508864 |
| 39 | -242032 |
| 40 | 29120 |
| 41 | -2800 |
| 42 | 224 |
| 43 | -16 |
| 44 | 1 |