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A209401
as a simple table
n
a(n)
1
0
2
0
3
0
4
2
5
0
6
0
7
0
8
18
9
2
10
0
11
0
12
4
13
0
14
0
15
0
16
228
17
0
18
4
19
0
20
4
21
0
22
0
23
0
24
36
25
2
26
0
27
23
28
4
29
0
30
0
31
0
[0,0,0,2,0,0,0,18,2,0,0,4,0,0,0,228,0,4,0,4,0,0,0, 36,2,0,23,4,0,0,0]