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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 29 |
| 4 | 1667 |
| 5 | 3254781 |
| 6 | 10650037396483 |
| 7 | 113423713055347294030815229 |
| 8 | 12864938683278671740537145090971257103576706009186307 |