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A163929 as a simple table

na(n)
11
21
316
41296
520736
612960000
74320000
810372320000
9165957120000
1040327580160000
1140327580160000
12590436101122560000
13590436101122560000
1416863445484161436160000
152409063640594490880000
162409063640594490880000

[1,1,16,1296,20736,12960000,4320000,10372320000,
 165957120000,40327580160000,40327580160000,
 590436101122560000,590436101122560000,
 16863445484161436160000,2409063640594490880000,
 2409063640594490880000]