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 | 0 |
| 2 | 8 |
| 3 | 50 |
| 4 | 352 |
| 5 | 282475258 |
| 6 | 232630513987258 |
| 7 | 418377847259091645147530834859099334519176045887014771594 |