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A224510 as a simple table
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 5 |
| 4 | 48 |
| 5 | 874 |
| 6 | 30264 |
| 7 | 2019680 |
| 8 | 263757552 |
| 9 | 68148453616 |
| 10 | 35042313517056 |
| 11 | 35957170070748800 |
| 12 | 73714223732206510848 |
| 13 | 302083108644327384484864 |
| 14 | 2475273899774743284992553984 |
| 15 | 40559859846438312840086623738880 |
| 16 | 1329146799084147159829387611140308992 |
[0,0,1,5,48,874,30264,2019680,263757552, 68148453616,35042313517056,35957170070748800, 73714223732206510848,302083108644327384484864, 2475273899774743284992553984, 40559859846438312840086623738880, 1329146799084147159829387611140308992] |