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A011961 as a simple table

n a(n)
1 0
2 1
3 2
4 2
5 3
6 6
7 6
8 9
9 13
10 15
11 18
12 25
13 27
14 34
15 42
16 47
17 54
18 67
19 72
20 84

[0,1,2,2,3,6,6,9,13,15,18,25,27,34,42,47,54,67,72,
 84]

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Last modified March 29 02:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)