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A108349 as a simple table

na(n)
11
21
32
424
525920
61511654400000
711882514930204672000000000000000
83711388892113415871206624306663300844748800000000000000000000000000000000000

[1,1,2,24,25920,1511654400000,
 11882514930204672000000000000000,
 37113888921134158712066243066633008447488000000000\
 00000000000000000000000000]