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) |
|---|---|
| 0 | 2 |
| 1 | 31 |
| 2 | 19 |
| 3 | 23 |
| 4 | 139 |
| 5 | 6089 |
| 6 | 40949 |
| 7 | 13153513 |
| 8 | 748105003 |
| 9 | 11307204673 |
| 10 | 202073177599 |
| 11 | 14740352606699 |