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 | 6 |
| 2 | 421 |
| 3 | 520017 |
| 4 | 13111482259 |
| 5 | 7470491620551006 |
| 6 | 103937249022030445057526 |