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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.

A055767 Index (or subscript) k of the largest primorial A002110(k) that divides the Euler phi of the n-th primorial (A005867(n)).

Table of values

n a(n)
1 0
2 1
3 1
4 2
5 3
6 3
7 3
8 3
9 3
10 5
11 5
12 5
13 5
14 5
15 5
16 6
17 6
18 6
19 6
20 6
21 6
22 6
23 6
24 6
25 6
26 6
27 7
28 7
29 7
30 7
31 7
32 7
33 7
34 7
35 7
36 7
37 7
38 7
39 7
40 7
41 7
42 7
43 10
44 10
45 10
46 10
47 10
48 10
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 16
65 16
66 16
67 16
68 16
69 16
70 16
71 16
72 16
73 16
74 16
75 16
76 16

List of values

[0, 1, 1, 2, 3, 3, 3, 3, 3, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16]

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

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