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A013494 as a simple table

n a(n)
0 1
1 0
2 0
3 -3
4 0
5 -15
6 90
7 -945
8 2520
9 -36855
10 368550
11 -5145525
12 31808700
13 -541215675
14 7577019450
15 -134726216625
16 1338322986000
17 -27408165159375
18 493346972868750
19 -10700744687758125
20 147490229469082500

[1,0,0,-3,0,-15,90,-945,2520,-36855,368550,
 -5145525,31808700,-541215675,7577019450,
 -134726216625,1338322986000,-27408165159375,
 493346972868750,-10700744687758125,
 147490229469082500]

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Last modified May 16 13:17 EDT 2024. Contains 372552 sequences. (Running on oeis4.)