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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.

A263089 Least monotonic left inverse for A261089; a(n) = largest k for which A261089(k) <= n.

Table of values

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

List of values

[0, 1, 1, 2, 2, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 9, 9, 10, 10, 11, 11, 11, 11, 12, 12, 13, 13, 13, 13, 14, 14, 15, 15, 15, 15, 15, 15, 15, 15, 16, 16, 17, 17, 17, 17, 18, 18, 19, 19, 20, 20, 20, 20, 21, 21, 22, 22, 22, 22, 23, 23, 24, 24, 24, 24, 25, 25, 26]

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