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 | 2 |
| 2 | 3 |
| 3 | 7 |
| 4 | 47 |
| 5 | 2207 |
| 6 | 4870843 |
| 7 | 23725111530599 |
| 8 | 562880917139361624513298747 |
| 9 | 316834926879648887020732217199607668221645859671769857 |