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 | 221355125 |
| 2 | 221355127 |
| 3 | 402640539 |
| 4 | 402640541 |
| 5 | 668862579 |
| 6 | 668862581 |
| 7 | 739577139 |
| 8 | 739577141 |