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 | 3 |
| 2 | 103993 |
| 3 | 833719 |
| 4 | 4272943 |
| 5 | 411557987 |
| 6 | 7809723338470423412693394150101387872685594299 |