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A139160 as a simple table

n a(n)
1 2
2 4
3 61
4 2521
5 19958401
6 3113510401
7 177843714048001
8 60822550204416001
9 12926008369442488320001
10 4420880996869850977271808000001
11 4111419327088961408862781440000001 

[2,4,61,2521,19958401,3113510401,177843714048001,
 60822550204416001,12926008369442488320001,
 4420880996869850977271808000001,
 4111419327088961408862781440000001]

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Last modified August 28 08:41 EDT 2024. Contains 375477 sequences. (Running on oeis4.)