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A079420 as a simple table

n a(n)
1 0
2 1
3 2
4 3
5 3
6 4
7 4
8 5
9 6
10 7
11 7
12 8
13 9
14 10
15 10
16 11
17 11
18 12
19 12
20 13
21 14
22 15
23 15
24 16
25 16
26 17
27 17
28 18

[0,1,2,3,3,4,4,5,6,7,7,8,9,10,10,11,11,12,12,13,
 14,15,15,16,16,17,17,18]

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Last modified September 20 05:24 EDT 2021. Contains 347577 sequences. (Running on oeis4.)