A167354 - OEIS

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A167354 as a simple table

n	a(n)
1	1
2	0
3	1
4	0
5	9
6	0
7	25
8	0
9	1
10	0
11	81
12	0
13	121
14	0
15	9
16	0
17	225
18	0
19	289
20	0
21	25
22	0
23	441
24	0
25	81
26	0
27	1
28	0
29	729
30	0
31	841
32	0
33	81
34	0
35	225
36	0
37	1225
38	0
39	121
40	0
41	1521
42	0
43	1681
44	0
45	9
46	0
47	2025
48	0
49	625
50	0

[1,0,1,0,9,0,25,0,1,0,81,0,121,0,9,0,225,0,289,0, 25,0,441,0,81,0,1,0,729,0,841,0,81,0,225,0,1225,0, 121,0,1521,0,1681,0,9,0,2025,0,625,0]