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A008774 as a simple table

na(n)
01
10
20
37680
44320
5276480
661440
72903040
8522720
916896000
102211840
1168774400
128960640
13221460480
1423224320
15603325440
1667154400
171448202240
18135168000
193154982400
20319809600
216359654400
22550195200
2312016788480
241147643520

[1,0,0,7680,4320,276480,61440,2903040,522720,
 16896000,2211840,68774400,8960640,221460480,
 23224320,603325440,67154400,1448202240,135168000,
 3154982400,319809600,6359654400,550195200,
 12016788480,1147643520]