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 | 47 |
| 2 | 117643 |
| 3 | 5764793 |
| 4 | 13841287189 |
| 5 | 15286700631942576193765185769276826357 |
| 6 | 36703368217294125441230211032033660188753 |