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 | 1 |
| 2 | 0 |
| 3 | 4 |
| 4 | 1 |
| 5 | 9 |
| 6 | 16 |
| 7 | 100 |
| 8 | 8649 |
| 9 | 74666881 |
| 10 | 5575141774264384 |
| 11 | 31082205803147712138788845611876 |
| 12 | 966103517589229313003894215813508352493573272034098666228778225 |