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 | 78 |
| 2 | -44928 |
| 3 | -14386944 |
| 4 | -5323508814 |
| 5 | -1996794824544 |
| 6 | -833028042023424 |
| 7 | -358702721913389568 |
| 8 | -160514702770156497360 |
| 9 | -73334654476723097306706 |
| 10 | -34151846554093744054455552 |
| 11 | -16125009656471947012310740224 |