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A084941 as a simple table

na(n)
01
11
28
3168
46720
5436800
641932800
75577062400
8981562982400
9220851671040000
1061838467891200000
1121086917550899200000
128603462360766873600000
134138265395528866201600000
142317428621496165072896000000

[1,1,8,168,6720,436800,41932800,5577062400,
 981562982400,220851671040000,61838467891200000,
 21086917550899200000,8603462360766873600000,
 4138265395528866201600000,
 2317428621496165072896000000]