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 | 2 |
| 3 | 15 |
| 4 | 87 |
| 5 | 579 |
| 6 | 4276 |
| 7 | 35103 |
| 8 | 322168 |
| 9 | 3264471 |
| 10 | 36285842 |
| 11 | 439070392 |
| 12 | 5747983086 |