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A065864 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 1
6 0
7 1
8 0
9 4
10 4
11 5
12 5
13 6
14 6
15 6
16 6
17 7
18 7
19 8
20 8
21 8
22 8
23 9
24 9
25 9
26 9
27 9
28 9
29 10
30 10
31 11
32 11
33 11
34 11
35 11
36 11
37 12
38 12
39 12
40 12
41 13
42 13
43 14
44 14
45 14
46 14
47 15
48 15
49 15
50 15
51 15
52 15
53 16
54 16
55 16
56 16
57 16
58 16
59 17
60 17
61 18
62 18
63 18
64 18
65 18
66 18
67 19
68 19
69 19
70 19
71 20
72 20
73 21
74 21
75 21
76 21
77 21
78 21

[0,0,0,0,1,0,1,0,4,4,5,5,6,6,6,6,7,7,8,8,8,8,9,9,
 9,9,9,9,10,10,11,11,11,11,11,11,12,12,12,12,13,13,
 14,14,14,14,15,15,15,15,15,15,16,16,16,16,16,16,
 17,17,18,18,18,18,18,18,19,19,19,19,20,20,21,21,
 21,21,21,21]

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Last modified April 21 20:59 EDT 2019. Contains 322328 sequences. (Running on oeis4.)