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A266289 as a simple table

n a(n)
1 1
2 0
3 2
4 9
5 435
6 20375
7 1624164
8 170338575
9 23301045360
10 4006433553814
11 845857620264286
12 215056002391454266 

[1,0,2,9,435,20375,1624164,170338575,23301045360,
 4006433553814,845857620264286,215056002391454266]

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Last modified May 14 04:33 EDT 2024. Contains 372528 sequences. (Running on oeis4.)