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A266040 as a simple table

n a(n)
1 1
2 0
3 8
4 104
5 6440
6 312960
7 36965712
8 3615441408
9 668391093888
10 108118788084480
11 29018593889026560
12 7014015968947706880

[1,0,8,104,6440,312960,36965712,3615441408,
 668391093888,108118788084480,29018593889026560,
 7014015968947706880]

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Last modified January 27 03:09 EST 2022. Contains 350601 sequences. (Running on oeis4.)