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A069219
as a simple table
n
a(n)
1
4
2
9
3
12
4
8
5
10
6
12
7
0
8
0
9
0
10
0
11
0
12
0
13
0
14
0
15
0
16
0
17
0
18
0
19
1
20
0
21
0
22
0
23
1
[4,9,12,8,10,12,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1]