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 | 8 |
| 2 | -431 |
| 3 | -18954 |
| 4 | -255583 |
| 5 | -1894076 |
| 6 | -9546255 |
| 7 | -35570638 |
| 8 | -91171007 |
| 9 | 0 |
| 10 | 2486784401 |
| 11 | 29023111918 |
| 12 | 277269756129 |
| 13 | 2531261328956 |
| 14 | 22856131408177 |
| 15 | 205852688735274 |
| 16 | 1852951469375105 |
| 17 | 16677063111790072 |
| 18 | 150094436937708753 |