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A127733
as a simple table
n
a(n)
1
1
2
0
3
4
4
0
5
0
6
9
7
0
8
0
9
0
10
16
11
0
12
0
13
0
14
0
15
25
16
0
17
0
18
0
19
0
20
0
21
36
22
0
23
0
24
0
25
0
26
0
27
0
28
49
[1,0,4,0,0,9,0,0,0,16,0,0,0,0,25,0,0,0,0,0,36,0,0, 0,0,0,0,49]