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A156690 as a simple table

n a(n)
0 1
1 1
2 1
3 1
4 -3
5 1
6 1
7 15
8 15
9 1
10 1
11 -105
12 525
13 -105
14 1
15 1
16 945
17 33075
18 33075
19 945
20 1
21 1
22 -10395
23 3274425
24 -22920975
25 3274425
26 -10395
27 1
28 1
29 135135
30 468242775
31 29499294825
32 29499294825
33 468242775
34 135135
35 1
36 1
37 -2027025
38 91307341125
39 -63275987399625
40 569483886596625
41 -63275987399625
42 91307341125
43 -2027025
44 1

[1,1,1,1,-3,1,1,15,15,1,1,-105,525,-105,1,1,945,
 33075,33075,945,1,1,-10395,3274425,-22920975,
 3274425,-10395,1,1,135135,468242775,29499294825,
 29499294825,468242775,135135,1,1,-2027025,
 91307341125,-63275987399625,569483886596625,
 -63275987399625,91307341125,-2027025,1]

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Last modified July 3 09:00 EDT 2024. Contains 373971 sequences. (Running on oeis4.)