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 | 2 |
| 2 | -446 |
| 3 | -2692 |
| 4 | 596716 |
| 5 | 6039032 |
| 6 | -1330532936 |
| 7 | -18966452272 |
| 8 | 4153245843856 |
| 9 | 76585719866912 |
| 10 | -16667474227882976 |
| 11 | -377970687856869952 |
| 12 | 81748056052306991296 |
| 13 | 2204537826531711723392 |
| 14 | -473817052252932475634816 |
| 15 | -14836222411655648808639232 |
| 16 | 3168592657883982912917729536 |