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 | 6 |
| 3 | 75 |
| 4 | 1575 |
| 5 | 49140 |
| 6 | 2110185 |
| 7 | 118513395 |
| 8 | 8391883500 |
| 9 | 728713460475 |
| 10 | 75932204473125 |
| 11 | 9329869676877750 |
| 12 | 1332483237190430325 |
| 13 | 218552871240812233125 |
| 14 | 40748996386059790578750 |