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 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 7680 |
| 4 | 4320 |
| 5 | 276480 |
| 6 | 61440 |
| 7 | 2903040 |
| 8 | 522720 |
| 9 | 16896000 |
| 10 | 2211840 |
| 11 | 68774400 |
| 12 | 8960640 |
| 13 | 221460480 |
| 14 | 23224320 |
| 15 | 603325440 |
| 16 | 67154400 |
| 17 | 1448202240 |
| 18 | 135168000 |
| 19 | 3154982400 |
| 20 | 319809600 |
| 21 | 6359654400 |
| 22 | 550195200 |
| 23 | 12016788480 |
| 24 | 1147643520 |