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 | 0 |
| 1 | -1 |
| 2 | -7 |
| 3 | -32 |
| 4 | 0 |
| 5 | -15625 |
| 6 | 243860689 |
| 7 | 59468035633789920 |
| 8 | 3536447262141707692104062559388672 |
| 9 | 12506459237909580203511583184455022770672120296396568887010875139183 |