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 | 2 |
| 1 | 4 |
| 2 | -4 |
| 3 | 6 |
| 4 | -12 |
| 5 | 8 |
| 6 | 8 |
| 7 | -24 |
| 8 | 32 |
| 9 | -16 |
| 10 | 10 |
| 11 | -40 |
| 12 | 80 |
| 13 | -80 |
| 14 | 32 |
| 15 | 12 |
| 16 | -60 |
| 17 | 160 |
| 18 | -240 |
| 19 | 192 |
| 20 | -64 |
| 21 | 14 |
| 22 | -84 |
| 23 | 280 |
| 24 | -560 |
| 25 | 672 |
| 26 | -448 |
| 27 | 128 |
| 28 | 16 |
| 29 | -112 |
| 30 | 448 |
| 31 | -1120 |
| 32 | 1792 |
| 33 | -1792 |
| 34 | 1024 |
| 35 | -256 |
| 36 | 18 |
| 37 | -144 |
| 38 | 672 |
| 39 | -2016 |
| 40 | 4032 |
| 41 | -5376 |
| 42 | 4608 |
| 43 | -2304 |
| 44 | 512 |
| 45 | 20 |
| 46 | -180 |
| 47 | 960 |
| 48 | -3360 |
| 49 | 8064 |