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 | 7 |
| 3 | 6553 |
| 4 | 3486784381 |
| 5 | 12157665459056928761 |
| 6 | 41745579179292917813953351511015323088870709281977 |
| 7 | 30432527221704537086371993251530170531786747066636939 |