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.

A125254 Smallest prime divisor of 4n-1 that is of the form 4k-1.

Table of values

n a(n)
1 3
2 7
3 11
4 3
5 19
6 23
7 3
8 31
9 7
10 3
11 43
12 47
13 3
14 11
15 59
16 3
17 67
18 71
19 3
20 79
21 83
22 3
23 7
24 19
25 3
26 103
27 107
28 3
29 23
30 7
31 3
32 127
33 131
34 3
35 139
36 11
37 3
38 151
39 31
40 3
41 163
42 167
43 3
44 7
45 179
46 3
47 11
48 191
49 3
50 199
51 7
52 3
53 211
54 43
55 3
56 223
57 227
58 3
59 47
60 239
61 3
62 19
63 251
64 3
65 7
66 263
67 3
68 271
69 11
70 3
71 283
72 7
73 3
74 59
75 23

List of values

[3, 7, 11, 3, 19, 23, 3, 31, 7, 3, 43, 47, 3, 11, 59, 3, 67, 71, 3, 79, 83, 3, 7, 19, 3, 103, 107, 3, 23, 7, 3, 127, 131, 3, 139, 11, 3, 151, 31, 3, 163, 167, 3, 7, 179, 3, 11, 191, 3, 199, 7, 3, 211, 43, 3, 223, 227, 3, 47, 239, 3, 19, 251, 3, 7, 263, 3, 271, 11, 3, 283, 7, 3, 59, 23]

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

Content is available under The OEIS End-User License Agreement.