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 | -14 |
| 2 | 86 |
| 3 | -3660 |
| 4 | -1042202 |
| 5 | -247948260 |
| 6 | -108448540420 |
| 7 | -67825082899288 |
| 8 | -56771982322924154 |
| 9 | -61577812542004343156 |
| 10 | -84012331763021201187180 |
| 11 | -140805160243370476949256616 |
| 12 | -284390871665315095422337087524 |