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 | 20160 |
| 3 | 24261120 |
| 4 | 1321205760 |
| 5 | 116064000000 |
| 6 | 489104179200 |
| 7 | 27811094169600 |
| 8 | 86586540687360 |
| 9 | 1044361663787520 |
| 10 | 2339850240000000 |
| 11 | 41393302251840000 |
| 12 | 32053931488051200 |
| 13 | 610296923230525440 |
| 14 | 560671658459136000 |
| 15 | 2815842631680000000 |
| 16 | 5674535530486824960 |