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 | 1 |
| 3 | 5 |
| 4 | 329 |
| 5 | 137483613 |
| 6 | 4509583237978309488810051189 |
| 7 | 242639939633545703354650791456741100816768201372832720247783531678176442265132915735721710004729333425 |