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 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 5 |
| 4 | 377 |
| 5 | 267914296 |
| 6 | 1725375039079340637797070384 |
| 7 | 202401005213503038261932567177107618332887918916819829782797456368284639448671475316218754 |