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) |
|---|---|
| 1 | 3 |
| 2 | 41 |
| 3 | 241 |
| 4 | 13441 |
| 5 | 13305601 |
| 6 | 118562476032001 |
| 7 | 8617338912961658880001 |
| 8 | 123997775596633739155999816050278400000001 |