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A052557 as a simple table

n a(n)
0 1
1 0
2 0
3 6
4 24
5 120
6 1440
7 15120
8 161280
9 2177280
10 32659200
11 518918400
12 9101030400
13 174356582400
14 3574309939200
15 78460462080000
16 1841205510144000
17 45883678224384000
18 1210048630382592000

[1,0,0,6,24,120,1440,15120,161280,2177280,
 32659200,518918400,9101030400,174356582400,
 3574309939200,78460462080000,1841205510144000,
 45883678224384000,1210048630382592000]

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Last modified April 7 15:56 EDT 2020. Contains 333306 sequences. (Running on oeis4.)