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 | 7 |
| 3 | 62 |
| 4 | 762 |
| 5 | 12264 |
| 6 | 245640 |
| 7 | 5897520 |
| 8 | 165145680 |
| 9 | 5284782720 |
| 10 | 190253266560 |
| 11 | 7610141548800 |
| 12 | 334846347897600 |
| 13 | 16072626136089600 |
| 14 | 835776577757721600 |
| 15 | 46803488615967283200 |
| 16 | 2808209320881060096000 |
| 17 | 179725396599156215808000 |