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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.

A365339 Length of the longest subsequence of 1,...,n on which the Euler totient function phi A000010 is nondecreasing.

Table of values

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

List of values

[1, 2, 3, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 11, 12, 12, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 16, 16, 17, 17, 17, 17, 18, 18, 19, 19, 19, 19, 20, 20, 21, 21, 21, 21, 22, 22, 22, 22, 22, 22, 23, 23, 23, 23, 23, 23, 24, 24, 25, 25, 25, 25, 26, 26, 27, 27, 27]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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