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) |
|---|---|
| 3 | 2479157521 |
| 4 | 159936660724017234488561 |
| 5 | 1119583852472161859174156302552583713828739479026834819554843860744244189 |