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 | 3 |
| 2 | 7 |
| 3 | 191 |
| 4 | 367 |
| 5 | 36319 |
| 6 | 260111 |
| 7 | 6921503 |
| 8 | 49570747 |
| 9 | 12893894812259 |
| 10 | 24019714105325502367 |
| 11 | 172025522413867986317 |
| 12 | 17007925267174811186047 |
| 13 | 3132517481738616046273627839643 |