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 | 14 |
| 2 | 439 |
| 3 | 24940 |
| 4 | 2250621 |
| 5 | 296266266 |
| 6 | 53624576979 |
| 7 | 12780684581400 |
| 8 | 3880806293223225 |
| 9 | 1462807581365269350 |
| 10 | 670261417348408188975 |
| 11 | 366936357918296751120900 |
| 12 | 236559234981486279096163125 |