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A254439 as a simple table

n a(n)
1 1
2 1
3 2
4 7
5 47
6 682
7 23132
8 1913821
9 397731998
10 212521309666
11 297464368728296

[1,1,2,7,47,682,23132,1913821,397731998,
 212521309666,297464368728296]

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Last modified August 4 09:03 EDT 2020. Contains 336201 sequences. (Running on oeis4.)