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 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 16 |
| 5 | 100 |
| 6 | 72 |
| 7 | 1764 |
| 8 | 768 |
| 9 | 39852 |
| 10 | 14400 |
| 11 | 1222100 |
| 12 | 277632 |
| 13 | 47179392 |
| 14 | 8754144 |
| 15 | 2319055200 |