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 | 2 |
| 2 | 16 |
| 3 | 230 |
| 4 | 10732 |
| 5 | 1495392 |
| 6 | 507962194 |
| 7 | 493466099722 |
| 8 | 1328921689649459 |
| 9 | 9633695407844528952 |
| 10 | 192630734231370260714836 |
| 11 | 10572973250296811381776668634 |