cp's OEIS Frontend

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.

A057023 Largest odd factor of (n-th prime-1); k when n-th prime is written as k*2^m+1 [with k odd].

Table of values

n a(n)
1 1
2 1
3 1
4 3
5 5
6 3
7 1
8 9
9 11
10 7
11 15
12 9
13 5
14 21
15 23
16 13
17 29
18 15
19 33
20 35
21 9
22 39
23 41
24 11
25 3
26 25
27 51
28 53
29 27
30 7
31 63
32 65
33 17
34 69
35 37
36 75
37 39
38 81
39 83
40 43
41 89
42 45
43 95
44 3
45 49
46 99
47 105
48 111
49 113
50 57
51 29
52 119
53 15
54 125
55 1
56 131
57 67
58 135
59 69
60 35
61 141
62 73
63 153
64 155
65 39
66 79
67 165
68 21
69 173
70 87

List of values

[1, 1, 1, 3, 5, 3, 1, 9, 11, 7, 15, 9, 5, 21, 23, 13, 29, 15, 33, 35, 9, 39, 41, 11, 3, 25, 51, 53, 27, 7, 63, 65, 17, 69, 37, 75, 39, 81, 83, 43, 89, 45, 95, 3, 49, 99, 105, 111, 113, 57, 29, 119, 15, 125, 1, 131, 67, 135, 69, 35, 141, 73, 153, 155, 39, 79, 165, 21, 173, 87]

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

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