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 | -8 |
| 3 | -73 |
| 4 | -919 |
| 5 | -13977 |
| 6 | -253640 |
| 7 | -5290184 |
| 8 | -124681406 |
| 9 | -3272865905 |
| 10 | -94671665085 |
| 11 | -2991846831531 |
| 12 | -102566663464544 |
| 13 | -3791541404744714 |
| 14 | -150357943095635464 |
| 15 | -6367699625807475503 |
| 16 | -286854179220742344135 |
| 17 | -13697182490105378305606 |