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 | 7 |
| 2 | 43 |
| 3 | 55987 |
| 4 | 7369130657357778596659 |
| 5 | 3546245297457217493590449191748546458005595187661976371 |