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A375846 as a simple table

na(n)
12
26
372
417280
52903040000
6669139107840000000000
71858095376984393503473664000000000000000000000
817605663024171636760609250204915381895780997959633600512000000000000000000000000000000000000000000

[2,6,72,17280,2903040000,669139107840000000000,
 1858095376984393503473664000000000000000000000,
 17605663024171636760609250204915381895780997959633\
 600512000000000000000000000000000000000000000000]