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A366752 as a simple table

na(n)
00
10
20
36
412
540
6540
73528
825200
9324000
103648960
1141690880
12622274400
139573033600
14150465579264
152705877820800
1651819600268800
171028013655818240
1822086154437442560
19504188626820659200
2011997041025160396800
21301999960230701322240

[0,0,0,6,12,40,540,3528,25200,324000,3648960,
 41690880,622274400,9573033600,150465579264,
 2705877820800,51819600268800,1028013655818240,
 22086154437442560,504188626820659200,
 11997041025160396800,301999960230701322240]