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 | 12 |
| 2 | 240 |
| 3 | 1260 |
| 4 | 20592 |
| 5 | 38220 |
| 6 | 65280 |
| 7 | 104652 |
| 8 | 159600 |
| 9 | 233772 |
| 10 | 809100 |
| 11 | 1047552 |
| 12 | 1335180 |
| 13 | 1678320 |
| 14 | 2083692 |
| 15 | 2558400 |
| 16 | 3109932 |
| 17 | 7308912 |
| 18 | 8500140 |
| 19 | 9831360 |
| 20 | 11313132 |
| 21 | 12956400 |
| 22 | 18970380 |
| 23 | 21376752 |
| 24 | 24005100 |
| 25 | 26868672 |
| 26 | 37008972 |
| 27 | 49780080 |