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 | 0 |
| 2 | 2 |
| 3 | 0 |
| 4 | -4 |
| 5 | 4 |
| 6 | 0 |
| 7 | 16 |
| 8 | -24 |
| 9 | 8 |
| 10 | 0 |
| 11 | -48 |
| 12 | 176 |
| 13 | -96 |
| 14 | 16 |
| 15 | 0 |
| 16 | 288 |
| 17 | -1120 |
| 18 | 1120 |
| 19 | -320 |
| 20 | 32 |
| 21 | 0 |
| 22 | -1920 |
| 23 | 8896 |
| 24 | -11520 |
| 25 | 5440 |
| 26 | -960 |
| 27 | 64 |
| 28 | 0 |
| 29 | 11520 |
| 30 | -77952 |
| 31 | 127232 |
| 32 | -80640 |
| 33 | 22400 |
| 34 | -2688 |
| 35 | 128 |
| 36 | 0 |
| 37 | -80640 |
| 38 | 738048 |
| 39 | -1480192 |
| 40 | 1195264 |
| 41 | -448000 |
| 42 | 82432 |
| 43 | -7168 |
| 44 | 256 |