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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.

A219792 Least k such that phi(k) = lambda(n), or 0 if there is no such k.

Table of values

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

List of values

[1, 1, 3, 3, 5, 3, 7, 3, 7, 5, 11, 3, 13, 7, 5, 5, 17, 7, 19, 5, 7, 11, 23, 3, 25, 13, 19, 7, 29, 5, 31, 15, 11, 17, 13, 7, 37, 19, 13, 5, 41, 7, 43, 11, 13, 23, 47, 5, 43, 25, 17, 13, 53, 19, 25, 7, 19, 29, 59, 5, 61, 31, 7, 17, 13, 11, 67, 17, 23, 13, 71, 7]

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