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 | -61 |
| 4 | 1737 |
| 5 | 88679 |
| 6 | 2086525 |
| 7 | -45950997 |
| 8 | -9763133167 |
| 9 | -705668046769 |
| 10 | -17356978593659 |
| 11 | 3823112141007763 |
| 12 | 788728947108214489 |
| 13 | 82036502117747569079 |
| 14 | 1412038521698998808077 |