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A177145 as a simple table

n a(n)
1 1
2 0
3 1
4 0
5 9
6 0
7 225
8 0
9 11025
10 0
11 893025
12 0
13 108056025
14 0
15 18261468225
16 0
17 4108830350625
18 0
19 1187451971330625
20 0
21 428670161650355625
22 0
23 189043541287806830625
24 0
25 100004033341249813400625
26 0
27 62502520838281133375390625
28 0
29 45564337691106946230659765625
30 0

[1,0,1,0,9,0,225,0,11025,0,893025,0,108056025,0,
 18261468225,0,4108830350625,0,1187451971330625,0,
 428670161650355625,0,189043541287806830625,0,
 100004033341249813400625,0,
 62502520838281133375390625,0,
 45564337691106946230659765625,0]

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Last modified April 19 08:20 EDT 2024. Contains 371782 sequences. (Running on oeis4.)