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 | 16 |
| 2 | -1666 |
| 3 | -88160 |
| 4 | 8195596 |
| 5 | 808903616 |
| 6 | -65817219704 |
| 7 | -10381352014976 |
| 8 | 719403241658000 |
| 9 | 171134120448798976 |
| 10 | -9706091347019300384 |
| 11 | -3444495256578225124864 |
| 12 | 150094259153430446720704 |
| 13 | 81845346744175071427394560 |
| 14 | -2440729611300811998925197184 |