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A075458 as a simple table

n a(n)
1 1
2 1
3 1
4 2
5 3
6 3
7 4
8 5
9 5
10 5
11 5
12 6
13 7
14 8
15 9
16 9
17 9
18 9
19 10

[1,1,1,2,3,3,4,5,5,5,5,6,7,8,9,9,9,9,10]

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Last modified May 27 06:24 EDT 2019. Contains 323599 sequences. (Running on oeis4.)