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 | 0 |
| 2 | 1681 |
| 3 | 976 |
| 4 | 20277009 |
| 5 | 433687328 |
| 6 | 420771471561 |
| 7 | 29037336149952 |
| 8 | 10986555692499984 |