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.

A005528 Størmer numbers or arc-cotangent irreducible numbers: numbers k such that the largest prime factor of k^2 + 1 is >= 2*k.

Table of values

n a(n)
1 1
2 2
3 4
4 5
5 6
6 9
7 10
8 11
9 12
10 14
11 15
12 16
13 19
14 20
15 22
16 23
17 24
18 25
19 26
20 27
21 28
22 29
23 33
24 34
25 35
26 36
27 37
28 39
29 40
30 42
31 44
32 45
33 48
34 49
35 51
36 52
37 53
38 54
39 56
40 58
41 59
42 60
43 61
44 62
45 63
46 64
47 65
48 66
49 67
50 69
51 71
52 74
53 77
54 78
55 79
56 80
57 81
58 82
59 84
60 85
61 86
62 87
63 88
64 89
65 90
66 92
67 94
68 95
69 96

List of values

[1, 2, 4, 5, 6, 9, 10, 11, 12, 14, 15, 16, 19, 20, 22, 23, 24, 25, 26, 27, 28, 29, 33, 34, 35, 36, 37, 39, 40, 42, 44, 45, 48, 49, 51, 52, 53, 54, 56, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 69, 71, 74, 77, 78, 79, 80, 81, 82, 84, 85, 86, 87, 88, 89, 90, 92, 94, 95, 96]