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 | 4 |
| 4 | -8 |
| 5 | 2 |
| 6 | -8 |
| 7 | 36 |
| 8 | -24 |
| 9 | 4 |
| 10 | 16 |
| 11 | -128 |
| 12 | 160 |
| 13 | -64 |
| 14 | 8 |
| 15 | -32 |
| 16 | 400 |
| 17 | -800 |
| 18 | 560 |
| 19 | -160 |
| 20 | 16 |
| 21 | 64 |
| 22 | -1152 |
| 23 | 3360 |
| 24 | -3584 |
| 25 | 1728 |
| 26 | -384 |
| 27 | 32 |
| 28 | -128 |
| 29 | 3136 |
| 30 | -12544 |
| 31 | 18816 |
| 32 | -13440 |
| 33 | 4928 |
| 34 | -896 |
| 35 | 64 |
| 36 | 256 |
| 37 | -8192 |
| 38 | 43008 |
| 39 | -86016 |
| 40 | 84480 |
| 41 | -45056 |
| 42 | 13312 |