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A200978 as a simple table

na(n)
36
472
5720
67200
775600
8846720
910160640
10130636800
111796256000
1226345088000
13410983372800
146799906713600
15118998367488000
162196892938240000
1742682491371520000
18870722823979008000
1918611700362551296000
20416026243398205440000

[6,72,720,7200,75600,846720,10160640,130636800,
 1796256000,26345088000,410983372800,6799906713600,
 118998367488000,2196892938240000,
 42682491371520000,870722823979008000,
 18611700362551296000,416026243398205440000]