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 | -960 |
| 3 | -58537 |
| 4 | -1044480 |
| 5 | -9732857 |
| 6 | -60204032 |
| 7 | -280378097 |
| 8 | -1056964608 |
| 9 | -3352566673 |
| 10 | -8926258176 |
| 11 | -17347490009 |
| 12 | 6802112512 |
| 13 | 411897322039 |
| 14 | 4108791856128 |
| 15 | 34607721698207 |
| 16 | 280375465082880 |
| 17 | 2249783819784799 |