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 | 0 |
| 1 | 64 |
| 2 | 4096 |
| 3 | 438976 |
| 4 | 32768000 |
| 5 | 2537716544 |
| 6 | 192699928576 |
| 7 | 14662949322176 |
| 8 | 1114512556032000 |
| 9 | 84722519068761664 |
| 10 | 6440005257691303936 |
| 11 | 489526700523945017536 |
| 12 | 37210462578386173952000 |
| 13 | 2828485190904971429628224 |