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) |
|---|---|
| 0 | 6 |
| 1 | 198 |
| 2 | 7761798 |
| 3 | 467613464999866416198 |
| 4 | 102249460387306384473056172738577521087843948916391508591105798 |