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 | 19 |
| 2 | 421 |
| 3 | 10039 |
| 4 | 95383574161 |
| 5 | 2384331073699 |
| 6 | 1925929944387235853055979210606894889560480247048440342330377620014353281101 |