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 | 2 |
| 1 | 0 |
| 2 | 9 |
| 3 | 161 |
| 4 | 2189 |
| 5 | 29861 |
| 6 | 510221 |
| 7 | 1547371 |
| 8 | 79332523 |
| 9 | 9592991561 |
| 10 | 265257420749 |
| 11 | 1102527599503 |