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) |
|---|---|
| 3 | 64 |
| 4 | 1024 |
| 5 | 12480 |
| 6 | 137472 |
| 7 | 1443616 |
| 8 | 14786176 |
| 9 | 149371964 |
| 10 | 1496777088 |
| 11 | 14924375156 |
| 12 | 148353336272 |
| 13 | 1471838989872 |
| 14 | 14584911842000 |
| 15 | 144423054478680 |