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 | 2 |
| 1 | 5 |
| 2 | 41 |
| 3 | 3281 |
| 4 | 21523361 |
| 5 | 926510094425921 |
| 6 | 1716841910146256242328924544641 |
| 7 | 5895092288869291585760436430706259332839105796137920554548481 |