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 | 4 |
| 2 | 8 |
| 3 | 24 |
| 4 | 120 |
| 5 | 840 |
| 6 | 9240 |
| 7 | 120120 |
| 8 | 2042040 |
| 9 | 38798760 |
| 10 | 1202761560 |
| 11 | 34880085240 |
| 12 | 802241960520 |
| 13 | 32891920381320 |
| 14 | 1414352576396760 |
| 15 | 52331045326680120 |
| 16 | 4657463034074530680 |
| 17 | 274790319010397310120 |
| 18 | 14563886907551057436360 |