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 | -16 |
| 1 | 128 |
| 2 | -560 |
| 3 | 1792 |
| 4 | -4704 |
| 5 | 10752 |
| 6 | -22176 |
| 7 | 42240 |
| 8 | -75504 |
| 9 | 128128 |
| 10 | -208208 |
| 11 | 326144 |
| 12 | -495040 |
| 13 | 731136 |
| 14 | -1054272 |
| 15 | 1488384 |
| 16 | -2062032 |
| 17 | 2808960 |
| 18 | -3768688 |
| 19 | 4987136 |
| 20 | -6517280 |
| 21 | 8419840 |
| 22 | -10764000 |
| 23 | 13628160 |
| 24 | -17100720 |
| 25 | 21280896 |
| 26 | -26279568 |
| 27 | 32220160 |
| 28 | -39239552 |