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A215588 as a simple table

n a(n)
0 1
1 0
2 0
3 3
4 0
5 -30
6 90
7 588
8 -5040
9 -11400
10 325080
11 -336072
12 -25237080
13 126955920
14 2273150880
15 -25210740552
16 -217110741120
17 4985924326080
18 16380284725440
19 -1066531842442752
20 1493617498611840
21 249776526926340480
22 -1647997041357152640
23 -63281386481329443072

[1,0,0,3,0,-30,90,588,-5040,-11400,325080,-336072,
 -25237080,126955920,2273150880,-25210740552,
 -217110741120,4985924326080,16380284725440,
 -1066531842442752,1493617498611840,
 249776526926340480,-1647997041357152640,
 -63281386481329443072]

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Last modified August 12 16:32 EDT 2022. Contains 356077 sequences. (Running on oeis4.)