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A179809 as a simple table

n a(n)
4 0
5 1
6 0
7 25
8 0
9 289
10 0
11 2025
12 0
13 16641
14 0
15 145161
16 0
17 1185921
18 0
19 9715689
20 0
21 80874049
22 0
23 668377609
24 0
25 5516478529
26 0
27 45630513769
28 0
29 377252695681
30 0
31 3117897783049
32 0
33 25774558228225
34 0
35 213069752354281
36 0
37 1761278190732225
38 0
39 14559352270703881

[0,1,0,25,0,289,0,2025,0,16641,0,145161,0,1185921,
 0,9715689,0,80874049,0,668377609,0,5516478529,0,
 45630513769,0,377252695681,0,3117897783049,0,
 25774558228225,0,213069752354281,0,
 1761278190732225,0,14559352270703881]

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Last modified January 26 20:11 EST 2020. Contains 331288 sequences. (Running on oeis4.)