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 | -7 |
| 2 | -95 |
| 3 | 2681 |
| 4 | 63745 |
| 5 | -3151687 |
| 6 | -111008735 |
| 7 | 7730428601 |
| 8 | 362578577665 |
| 9 | -32485422829447 |
| 10 | -1904310174842975 |
| 11 | 208548540123990521 |
| 12 | 14670031692604944385 |
| 13 | -1898693409680238225607 |
| 14 | -155820577900257936731615 |
| 15 | 23270028476826775276304441 |
| 16 | 2182522600557853423794875905 |