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) |
|---|---|
| 1 | -5 |
| 2 | 6 |
| 3 | -7 |
| 4 | -161 |
| 5 | 1045 |
| 6 | -2525 |
| 7 | 2795 |
| 8 | 4825 |
| 9 | 9725 |
| 10 | -159115 |
| 11 | 307993 |
| 12 | -359315 |
| 13 | -18377525 |
| 14 | 25484825 |