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 | 280743771536011781 |
| 2 | 666787209284980781 |
| 3 | 1386744766793550161 |
| 4 | 6558237049521329741 |
| 5 | 11646802313400102461 |