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 | 26 |
| 2 | -382 |
| 3 | -64948 |
| 4 | -476180 |
| 5 | 262479256 |
| 6 | 9343452856 |
| 7 | -1423288542832 |
| 8 | -106203113965168 |
| 9 | 9285433263435680 |
| 10 | 1252687316025657376 |
| 11 | -65670013710482402624 |
| 12 | -16286195340379143010112 |
| 13 | 410305415218426865451392 |
| 14 | 234668271507253831462816640 |
| 15 | 23931248973260886967214336 |