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 | -142 |
| 3 | -11452 |
| 4 | -16340 |
| 5 | 15254344 |
| 6 | 241175416 |
| 7 | -27559353808 |
| 8 | -956451987568 |
| 9 | 61130164870880 |
| 10 | 3765349254374176 |
| 11 | -153905067702335936 |
| 12 | -16154239475595889472 |
| 13 | 398079601942332103808 |
| 14 | 76554842682960987793280 |
| 15 | -811944878829661686113536 |
| 16 | -399500280706227471717519104 |