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 | 13 |
| 2 | 3803 |
| 3 | 1865491 |
| 4 | 710030729 |
| 5 | 144432372463 |
| 6 | 11659784792119 |