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 | 2 |
| 2 | 2 |
| 3 | 2 |
| 4 | 2 |
| 5 | 89 |
| 6 | 1122659 |
| 7 | 19099919 |
| 8 | 85864769 |
| 9 | 26089808579 |
| 10 | 554688278429 |
| 11 | 554688278429 |
| 12 | 4090932431513069 |
| 13 | 95405042230542329 |