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A072688 as a simple table

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

[1,2,3,3,3,4,5,6,6,7,7,7,7,7,8,9,10,10,10,10,10,
 10,11,11,11,11,12,13,13,13,13,13,14,14,14,14,15,
 16,16,17,17,17,17,17,17,17,17,17,17,18,18,18,18,
 18,18,18,18,18,18,19,19,19,19,19,19,19,19,19,19,
 20]

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Last modified May 26 17:16 EDT 2022. Contains 354092 sequences. (Running on oeis4.)