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) |
|---|---|
| 5 | 1 |
| 6 | -229691 |
| 7 | 57554154133 |
| 8 | -14313032243145515 |
| 9 | 3561712204486990461397 |
| 10 | -886264409554702323499876907 |
| 11 | 220531019414004693731359534452181 |
| 12 | -54875173091354091477849994502919434795 |