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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A089361 Numbers of pairs (i, j), i, j > 1, such that i^j <= n.

Table of values

n a(n)
1 0
2 0
3 0
4 1
5 1
6 1
7 1
8 2
9 3
10 3
11 3
12 3
13 3
14 3
15 3
16 5
17 5
18 5
19 5
20 5
21 5
22 5
23 5
24 5
25 6
26 6
27 7
28 7
29 7
30 7
31 7
32 8
33 8
34 8
35 8
36 9
37 9
38 9
39 9
40 9
41 9
42 9
43 9
44 9
45 9
46 9
47 9
48 9
49 10
50 10
51 10
52 10
53 10
54 10
55 10
56 10
57 10
58 10
59 10
60 10
61 10
62 10
63 10
64 13
65 13
66 13
67 13
68 13
69 13
70 13
71 13
72 13
73 13
74 13
75 13
76 13
77 13
78 13
79 13
80 13
81 15
82 15
83 15
84 15
85 15
86 15

List of values

[0, 0, 0, 1, 1, 1, 1, 2, 3, 3, 3, 3, 3, 3, 3, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 7, 7, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 15, 15, 15, 15, 15, 15]

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