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) |
|---|---|
| 2 | 9 |
| 3 | 12880 |
| 4 | 20449 |
| 5 | 10764222 |
| 6 | 794629045 |
| 7 | 33205080888 |
| 8 | 5985 |
| 9 | 13925100 |