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 | 13 |
| 2 | 197 |
| 3 | 613 |
| 4 | 13404133 |
| 5 | 24663654373 |
| 6 | 37455569511954513919973 |
| 7 | 448140631309739369262009548799973 |
| 8 | 38794993239276710062728555790335999973 |