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 | 2 |
| 2 | 5 |
| 3 | 19 |
| 4 | 1172 |
| 5 | 18742 |
| 6 | 74967 |
| 7 | 307062002 |
| 8 | 329705313529178423 |
| 9 | 88504596182827979077122168 |
| 10 | 23200948861751257747193113585514 |
| 11 | 24327958153659686843520766271043070385 |