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 | 2 |
| 2 | 23 |
| 3 | 547 |
| 4 | 2357 |
| 5 | 4359293547691 |
| 6 | 325798243129564339 |
| 7 | 3947306373286437248759663633906484193454376823 |