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 | -1 |
| 2 | -512 |
| 3 | -19171 |
| 4 | -111645 |
| 5 | 8255899 |
| 6 | 287477144 |
| 7 | 3248973702 |
| 8 | -56353404842 |
| 9 | -2946880278857 |
| 10 | -50078654012311 |
| 11 | -24091665240825 |
| 12 | 19437354184565824 |
| 13 | 486126425619195338 |
| 14 | 4607922953609319032 |
| 15 | -63107867988829247005 |
| 16 | -3101395214088243725145 |