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) |
|---|---|
| 0 | 7 |
| 1 | 37 |
| 2 | 1297 |
| 3 | 1679617 |
| 4 | 2821109907457 |
| 5 | 7958661109946400884391937 |
| 6 | 63340286662973277706162286946811886609896461828097 |