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 | 7 |
| 2 | 79792266297612001 |
| 3 | 7730993719707444524137094407 |
| 4 | 749048330965186233494494102694564493649 |
| 5 | 72574551534231909331741171093173785967490646405143 |