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 | -5 |
| 2 | -479 |
| 3 | -15313 |
| 4 | 710401 |
| 5 | -3532731539 |
| 6 | -1439747442109 |
| 7 | -34886932972781 |
| 8 | -171887027703456763 |
| 9 | -6317295244143234168127 |
| 10 | -2059266220658860906379923 |
| 11 | -16155159358654324183625719723 |
| 12 | -125609753430605939189919003924509 |