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A008997 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 1
6 1
7 1
8 1
9 2
10 2
11 2
12 3
13 3
14 4
15 6
16 6
17 7
18 9
19 10
20 11

[0,0,0,0,1,1,1,1,2,2,2,3,3,4,6,6,7,9,10,11]

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Last modified October 18 12:18 EDT 2019. Contains 328160 sequences. (Running on oeis4.)