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 | 9 |
| 2 | 24 |
| 3 | 1698 |
| 4 | 66846 |
| 5 | 28467 |
| 6 | 1129019 |
| 7 | 710100 |
| 8 | 36488176 |
| 9 | 2011485307 |
| 10 | 4663739959 |
| 11 | 60422218263 |
| 12 | 1379574176590 |
| 13 | 26258139334603 |