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.

A377865 Smallest divisor of 2n-1 greater than or equal to sqrt(2n-1).

Table of values

n a(n)
1 1
2 3
3 5
4 7
5 3
6 11
7 13
8 5
9 17
10 19
11 7
12 23
13 5
14 9
15 29
16 31
17 11
18 7
19 37
20 13
21 41
22 43
23 9
24 47
25 7
26 17
27 53
28 11
29 19
30 59
31 61
32 9
33 13
34 67
35 23
36 71
37 73
38 15
39 11
40 79
41 9
42 83
43 17
44 29
45 89
46 13
47 31
48 19
49 97
50 11
51 101
52 103
53 15
54 107
55 109
56 37
57 113
58 23
59 13
60 17
61 11
62 41
63 25
64 127
65 43
66 131
67 19

List of values

[1, 3, 5, 7, 3, 11, 13, 5, 17, 19, 7, 23, 5, 9, 29, 31, 11, 7, 37, 13, 41, 43, 9, 47, 7, 17, 53, 11, 19, 59, 61, 9, 13, 67, 23, 71, 73, 15, 11, 79, 9, 83, 17, 29, 89, 13, 31, 19, 97, 11, 101, 103, 15, 107, 109, 37, 113, 23, 13, 17, 11, 41, 25, 127, 43, 131, 19]

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

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