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 | 231 |
| 2 | 17903 |
| 3 | 303955 |
| 4 | 9654533 |
| 5 | 300895245 |
| 6 | 10356370455 |
| 7 | 360008261031 |