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 | 3 |
| 1 | 73 |
| 2 | 8599 |
| 3 | 400091364 |
| 4 | 371853741549033970 |
| 5 | 253461181173408820488703379557217678 |