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The On-Line Encyclopedia of Integer Sequences
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A325880
as a simple table
n
a(n)
1
1
2
1
3
2
4
2
5
4
6
8
7
8
8
10
9
18
10
34
11
50
12
70
13
78
14
89
15
120
16
181
17
277
18
401
19
561
20
728
21
867
22
1031
23
1219
24
1537
[1,1,2,2,4,8,8,10,18,34,50,70,78,89,120,181,277, 401,561,728,867,1031,1219,1537]