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A091868 as a simple table

na(n)
01
11
28
31296
47962624
52985984000000
6100306130042880000000
7416336312719673760153600000000
8281633758444745849464726940024832000000000
939594086612242519324387557078266845776303882240000000000

[1,1,8,1296,7962624,2985984000000,
 100306130042880000000,
 416336312719673760153600000000,
 281633758444745849464726940024832000000000,
 39594086612242519324387557078266845776303882240000\
 000000]