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 | 1 |
| 2 | 768 |
| 3 | 39366 |
| 4 | 655360 |
| 5 | 5859375 |
| 6 | 35271936 |
| 7 | 161414428 |
| 8 | 603979776 |
| 9 | 1937102445 |
| 10 | 5500000000 |
| 11 | 14147686146 |
| 12 | 33538572288 |
| 13 | 74231495611 |
| 14 | 154957850880 |
| 15 | 307546875000 |
| 16 | 584115552256 |
| 17 | 1067290888473 |
| 18 | 1884413258496 |
| 19 | 3226876977790 |