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 | 18 |
| 2 | 324 |
| 3 | 6572 |
| 4 | 132640 |
| 5 | 3030492 |
| 6 | 68633066 |
| 7 | 1733220521 |
| 8 | 43321058602 |
| 9 | 1182486223832 |