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A072043 as a simple table

na(n)
11
21
31
42
53
68
760
81728
9967680
10114661785600
11215698302044209152000
1226592225368515593301597083402240000000
13723457119656730571214801208759677424070060705650559470796800000000000

[1,1,1,2,3,8,60,1728,967680,114661785600,
 215698302044209152000,
 26592225368515593301597083402240000000,
 72345711965673057121480120875967742407006070565055\
 9470796800000000000]