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A052139 as a simple table

na(n)
11
26
318
4216
59720
69720
71224720
829393280
918895680
101984046400
1132736765600
12392841187200
13183849675609600
144211828932147200
1525738954585344000
168339421285651456000
1721265524278411212800
18437462213727316377600

[1,6,18,216,9720,9720,1224720,29393280,18895680,
 1984046400,32736765600,392841187200,
 183849675609600,4211828932147200,
 25738954585344000,8339421285651456000,
 21265524278411212800,437462213727316377600]