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 | 48 |
| 2 | 5132148528 |
| 3 | 261673815513000717140575872 |
| 4 | 655010254318810176195603896415342984711897764371763012689776 |