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 | 1 |
| 2 | 15 |
| 3 | 360 |
| 4 | 11880 |
| 5 | 498960 |
| 6 | 25446960 |
| 7 | 1526817600 |
| 8 | 105350414400 |
| 9 | 8217332323200 |
| 10 | 714907912118400 |
| 11 | 68631159563366400 |
| 12 | 7206271754153472000 |
| 13 | 821514979973495808000 |
| 14 | 101046342536739984384000 |
| 15 | 13338117214849677938688000 |
| 16 | 1880674527293804589355008000 |
| 17 | 282101179094070688403251200000 |