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A083568 as a simple table

n a(n)
1 1
2 1
3 2
4 12
5 286
6 33592
7 23178480
8 108995910720
9 3973186258569120

[1,1,2,12,286,33592,23178480,108995910720,
 3973186258569120]

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Last modified May 28 07:30 EDT 2022. Contains 354112 sequences. (Running on oeis4.)