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 | -11 |
| 3 | -343 |
| 4 | 871 |
| 5 | 54871 |
| 6 | -12359 |
| 7 | -102902159 |
| 8 | -137687549 |
| 9 | 344971369 |
| 10 | 20000206271 |
| 11 | -34379966953693 |
| 12 | -452834430450401 |
| 13 | 18163626705916771 |
| 14 | 951418549566510481 |
| 15 | -381881231033010506527 |
| 16 | -4252976361755938012709 |
| 17 | -218740547087902859463611 |