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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 175392 |
| 4 | 52636048080 |
| 5 | 236901615304560 |
| 6 | 136750498496102880 |
| 7 | 22791207032346814320 |
| 8 | 1646492374456377504672 |
| 9 | 65181439861421995954080 |
| 10 | 1639402077308605107361920 |
| 11 | 28932563258378720821964160 |
| 12 | 384247128673776043122297840 |
| 13 | 4041651944711085007033425552 |
[0,0,0,175392,52636048080,236901615304560, 136750498496102880,22791207032346814320, 1646492374456377504672,65181439861421995954080, 1639402077308605107361920, 28932563258378720821964160, 384247128673776043122297840, 4041651944711085007033425552] |