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 | 2 |
| 2 | 8 |
| 3 | 15 |
| 4 | 48 |
| 5 | 1152 |
| 6 | 19200 |
| 7 | 62370 |
| 8 | 322560 |
| 9 | 17418240 |
| 10 | 567705600 |
| 11 | 2481078600 |
| 12 | 16907304960 |
| 13 | 1504935936000 |
| 14 | 8799558768000 |
| 15 | 76435881984000 |
| 16 | 819678899239200 |
| 17 | 10176845001523200 |
| 18 | 2169274855587840000 |
| 19 | 215013524533936128000 |