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 | 11 |
| 3 | 709 |
| 4 | 167449 |
| 5 | 88362852307 |
| 6 | 156740126985437 |
| 7 | 1172447586903041169661 |