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A130718 as a simple table

na(n)
12
22
312
4240
5725760
679833600
72615348736000
8711374856192000
9102181884343418880000
1021777738900836704321536000000
1117683523987479403909087232000000

[2,2,12,240,725760,79833600,2615348736000,
 711374856192000,102181884343418880000,
 21777738900836704321536000000,
 17683523987479403909087232000000]