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) |
|---|---|
| 0 | 12 |
| 1 | 120 |
| 2 | 720 |
| 3 | 3360 |
| 4 | 13440 |
| 5 | 48384 |
| 6 | 161280 |
| 7 | 506880 |
| 8 | 1520640 |
| 9 | 4392960 |
| 10 | 12300288 |
| 11 | 33546240 |
| 12 | 89456640 |
| 13 | 233963520 |
| 14 | 601620480 |
| 15 | 1524105216 |
| 16 | 3810263040 |
| 17 | 9413591040 |
| 18 | 23011000320 |
| 19 | 55710842880 |
| 20 | 133706022912 |
| 21 | 318347673600 |
| 22 | 752458137600 |
| 23 | 1766640844800 |
| 24 | 4122161971200 |