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A280063 as a simple table

n a(n)
1 1
2 1
3 5
4 52
5 790
6 23564
7 1188839
8 110266512
9 18113056960
10 5286615353516
11 2755789744812452 

[1,1,5,52,790,23564,1188839,110266512,18113056960,
 5286615353516,2755789744812452]

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Last modified October 3 20:04 EDT 2023. Contains 365870 sequences. (Running on oeis4.)