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 | 1 |
| 2 | 7 |
| 3 | 57 |
| 4 | 973 |
| 5 | 32057 |
| 6 | 2079303 |
| 7 | 267612891 |
| 8 | 68648459435 |
| 9 | 35172685493889 |