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 | 3 |
| 2 | 8 |
| 3 | 27 |
| 4 | 135 |
| 5 | 1215 |
| 6 | 15795 |
| 7 | 328050 |
| 8 | 4920750 |
| 9 | 127764000 |
| 10 | 5826168000 |
| 11 | 126097171200 |