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 | 7 |
| 2 | 161 |
| 3 | 10507 |
| 4 | 1807653 |
| 5 | 790197579 |
| 6 | 861351043995 |
| 7 | 2318511875463567 |
| 8 | 15333331066778365463 |