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A081651
as a simple table
n
a(n)
0
1
1
1
2
1
3
2
4
2
5
2
6
2
7
3
8
3
9
4
10
5
11
10
12
86
13
1499263005586576
[1,1,1,2,2,2,2,3,3,4,5,10,86,1499263005586576]