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A270251 as a simple table

na(n)
10
212
366
4468
53612
640020
7601368
812473568
9355574028
1013968754800
11756926837340
1256646343727400
135861182843734528
14839281074844449036
15166460255072308752300
1645762947464712474066844

[0,12,66,468,3612,40020,601368,12473568,355574028,
 13968754800,756926837340,56646343727400,
 5861182843734528,839281074844449036,
 166460255072308752300,45762947464712474066844]