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 | 82 |
| 3 | 537355 |
| 4 | 285611227174 |
| 5 | 12294441765937436842 |
| 6 | 42868139471008987306371257332 |
| 7 | 12107226510541735123474554479514562160539 |