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A179724 as a simple table

na(n)
40
5120
6720
73780
820160
9113400
10680400
114989600
1236590400
13273873600
142085283200
1515807792000

[0,120,720,3780,20160,113400,680400,4989600,
 36590400,273873600,2085283200,15807792000]