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.

A240370 Positive integers n such that every element in the ring of integers modulo n can be written as the sum of two squares modulo n.

Table of values

n a(n)
1 1
2 2
3 3
4 5
5 6
6 7
7 10
8 11
9 13
10 14
11 15
12 17
13 19
14 21
15 22
16 23
17 25
18 26
19 29
20 30
21 31
22 33
23 34
24 35
25 37
26 38
27 39
28 41
29 42
30 43
31 46
32 47
33 50
34 51
35 53
36 55
37 57
38 58
39 59
40 61
41 62
42 65
43 66
44 67
45 69
46 70
47 71
48 73
49 74
50 75
51 77
52 78
53 79
54 82
55 83
56 85
57 86
58 87
59 89
60 91
61 93
62 94
63 95
64 97
65 101
66 102
67 103
68 105
69 106
70 107
71 109
72 110
73 111
74 113
75 114
76 115
77 118
78 119
79 122
80 123
81 125
82 127
83 129
84 130
85 131
86 133
87 134
88 137
89 138
90 139
91 141
92 142
93 143
94 145
95 146
96 149
97 150
98 151
99 154
100 155
101 157
102 158
103 159
104 161
105 163
106 165
107 166
108 167
109 169

List of values

[1, 2, 3, 5, 6, 7, 10, 11, 13, 14, 15, 17, 19, 21, 22, 23, 25, 26, 29, 30, 31, 33, 34, 35, 37, 38, 39, 41, 42, 43, 46, 47, 50, 51, 53, 55, 57, 58, 59, 61, 62, 65, 66, 67, 69, 70, 71, 73, 74, 75, 77, 78, 79, 82, 83, 85, 86, 87, 89, 91, 93, 94, 95, 97, 101, 102, 103, 105, 106, 107, 109, 110, 111, 113, 114, 115, 118, 119, 122, 123, 125, 127, 129, 130, 131, 133, 134, 137, 138, 139, 141, 142, 143, 145, 146, 149, 150, 151, 154, 155, 157, 158, 159, 161, 163, 165, 166, 167, 169]