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A326856 as a simple table

n a(n)
0 1
1 1
2 0
3 0
4 0
5 24
6 144
7 0
8 0
9 40320
10 403200
11 0
12 0
13 479001600
14 8643317760
15 29059430400
16 0
17 20922789888000
18 475108274995200
19 1871463083212800
20 0
21 2432902008176640000
22 76354225980899328000
23 525098781423304704000
24 0
25 620448401733239439360000

[1,1,0,0,0,24,144,0,0,40320,403200,0,0,479001600,
 8643317760,29059430400,0,20922789888000,
 475108274995200,1871463083212800,0,
 2432902008176640000,76354225980899328000,
 525098781423304704000,0,620448401733239439360000]

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Last modified April 23 18:16 EDT 2024. Contains 371916 sequences. (Running on oeis4.)