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 | 397575 |
| 2 | 3145425129 |
| 3 | 7096702977 |
| 4 | 53164445037705 |
| 5 | 130468907286855 |
| 6 | 1229923663366167 |
| 7 | 2774951736355071 |