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 | 2 |
| 3 | 13 |
| 4 | 621 |
| 5 | 4458 |
| 6 | 489884458 |
| 7 | 632318261 |
| 8 | 893464178 |
| 9 | 16684802253 |
| 10 | 1621069592578 |
| 11 | 2502478528946 |
| 12 | 250255842662341 |
| 13 | 1543458022195053 |
| 14 | 527851115257700546 |