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A052665 as a simple table

na(n)
00
10
22
318
4168
51800
622320
7317520
85120640
992534400
101854316800
1140834886400
12980516275200
1325499650176000
14714077383219200
1521423629170944000
16685577056260096000
1723309975600271360000

[0,0,2,18,168,1800,22320,317520,5120640,92534400,
 1854316800,40834886400,980516275200,
 25499650176000,714077383219200,21423629170944000,
 685577056260096000,23309975600271360000]