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 | 15 |
| 1 | 85 |
| 2 | 4369 |
| 3 | 16843009 |
| 4 | 281479271743489 |
| 5 | 79228162532711081671548469249 |
| 6 | 6277101735386680764176071790128604879584176795969512275969 |