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 | 11 |
| 4 | 64 |
| 5 | 567 |
| 6 | 7883 |
| 7 | 172914 |
| 8 | 6044619 |
| 9 | 338333121 |
| 10 | 30444101814 |
| 11 | 4414062308985 |
| 12 | 1032860468654721 |
| 13 | 390416873200823322 |
| 14 | 238543681049185056237 |
| 15 | 235680767488198152732339 |