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 | 5 |
| 2 | 108 |
| 3 | 232679 |
| 4 | 10800002482161878 |
| 5 | 501291709241928681821536049732850843483551117235 |