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A178235 as a simple table

n a(n)
0 0
1 1
2 0
3 -2
4 0
5 40
6 0
7 -3024
8 0
9 604800
10 0
11 -262690560
12 0
13 217945728000
14 0
15 -315323879270400
16 0
17 742997162299392000
18 0
19 -2703345607134653644800
20 0
21 14552624755991316234240000
22 0
23 -111913707637423660385894400000
24 0

[0,1,0,-2,0,40,0,-3024,0,604800,0,-262690560,0,
 217945728000,0,-315323879270400,0,
 742997162299392000,0,-2703345607134653644800,0,
 14552624755991316234240000,0,
 -111913707637423660385894400000,0]

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Last modified March 28 11:59 EDT 2024. Contains 371254 sequences. (Running on oeis4.)