A189245 - OEIS

A189245 as a simple table

n	a(n)
1	0
2	1
3	1
4	0
5	4
6	0
7	1
8	9
9	9
10	1
11	0
12	25
13	0
14	25
15	0
16	1
17	64
18	121
19	121
20	64
21	1
22	0
23	169
24	0
25	1296
26	0
27	169
28	0
29	1
30	441
31	1681
32	9025
33	9025
34	1681
35	441
36	1
37	0
38	1156
39	0
40	78961
41	0
42	78961
43	0
44	1156
45	0
46	1
47	3025
48	23409
49	609961
50	1399489
51	1399489
52	609961
53	23409
54	3025
55	1

[0,1,1,0,4,0,1,9,9,1,0,25,0,25,0,1,64,121,121,64, 1,0,169,0,1296,0,169,0,1,441,1681,9025,9025,1681, 441,1,0,1156,0,78961,0,78961,0,1156,0,1,3025, 23409,609961,1399489,1399489,609961,23409,3025,1]