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A065866 as a simple table

na(n)
01
12
210
384
41008
515840
6308880
77207200
8196035840
96094932480
10213322636800
118303173401600
12355850288640000
1316653793508352000
14845180020548864000
1546236318771202560000
162712530701243883520000
17169890080762116915200000
1811314679378756986552320000

[1,2,10,84,1008,15840,308880,7207200,196035840,
 6094932480,213322636800,8303173401600,
 355850288640000,16653793508352000,
 845180020548864000,46236318771202560000,
 2712530701243883520000,169890080762116915200000,
 11314679378756986552320000]