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 | 0 |
| 2 | 1 |
| 3 | 39 |
| 4 | 85705 |
| 5 | 4026303 |
| 6 | 8886048529 |
| 7 | 417455130327 |
| 8 | 921323283480793 |
| 9 | 43282582818520431 |
| 10 | 95524640668969514017 |