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A084940 as a simple table

na(n)
01
11
27
3126
44284
5235620
619085220
72137544640
8316356606720
959791398670080
1014050978687468800
114018579904616076800
121374354327378698265600
13553864793933615401036800
14259762588354865623086259200

[1,1,7,126,4284,235620,19085220,2137544640,
 316356606720,59791398670080,14050978687468800,
 4018579904616076800,1374354327378698265600,
 553864793933615401036800,
 259762588354865623086259200]