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 | 3 |
| 2 | 5 |
| 3 | 29 |
| 4 | 727 |
| 5 | 3628811 |
| 6 | 80658175170943878571660636856403766975289505440883277824000000000053 |