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A264952 as a simple table

n a(n)
1 0
2 2
3 12
4 504
5 22320
6 1521360
7 140394240
8 17034433920
9 2627788262400
10 502511002156800
11 116684130094963200
12 32342603041381248000

[0,2,12,504,22320,1521360,140394240,17034433920,
 2627788262400,502511002156800,116684130094963200,
 32342603041381248000]

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Last modified September 24 15:40 EDT 2021. Contains 347643 sequences. (Running on oeis4.)