A240109 - cp's OEIS frontend

A240109 Positive integers n such that every element in the ring of integers modulo n can be written as the sum of two nonzero squares modulo n.

n	a(n)
1	10
2	13
3	17
4	26
5	29
6	30
7	34
8	37
9	39
10	41
11	50
12	51
13	53
14	58
15	61
16	65
17	70
18	73
19	74
20	78
21	82
22	85
23	87
24	89
25	91
26	97
27	101
28	102
29	106
30	109
31	110
32	111
33	113
34	119
35	122
36	123
37	125
38	130
39	137
40	143
41	145
42	146
43	149
44	150
45	157
46	159
47	169
48	170
49	173
50	174
51	178
52	181
53	182
54	183
55	185
56	187
57	190
58	193
59	194
60	195
61	197

[10, 13, 17, 26, 29, 30, 34, 37, 39, 41, 50, 51, 53, 58, 61, 65, 70, 73, 74, 78, 82, 85, 87, 89, 91, 97, 101, 102, 106, 109, 110, 111, 113, 119, 122, 123, 125, 130, 137, 143, 145, 146, 149, 150, 157, 159, 169, 170, 173, 174, 178, 181, 182, 183, 185, 187, 190, 193, 194, 195, 197]

cp's OEIS Frontend

A240109 Positive integers n such that every element in the ring of integers modulo n can be written as the sum of two nonzero squares modulo n.

Table of values

List of values

n	a(n)
1	10
2	13
3	17
4	26
5	29
6	30
7	34
8	37
9	39
10	41
11	50
12	51
13	53
14	58
15	61
16	65
17	70
18	73
19	74
20	78
21	82
22	85
23	87
24	89
25	91
26	97
27	101
28	102
29	106
30	109
31	110
32	111
33	113
34	119
35	122
36	123
37	125
38	130
39	137
40	143
41	145
42	146
43	149
44	150
45	157
46	159
47	169
48	170
49	173
50	174
51	178
52	181
53	182
54	183
55	185
56	187
57	190
58	193
59	194
60	195
61	197

n	a(n)
1	10
2	13
3	17
4	26
5	29
6	30
7	34
8	37
9	39
10	41
11	50
12	51
13	53
14	58
15	61
16	65
17	70
18	73
19	74
20	78
21	82
22	85
23	87
24	89
25	91
26	97
27	101
28	102
29	106
30	109
31	110
32	111
33	113
34	119
35	122
36	123
37	125
38	130
39	137
40	143
41	145
42	146
43	149
44	150
45	157
46	159
47	169
48	170
49	173
50	174
51	178
52	181
53	182
54	183
55	185
56	187
57	190
58	193
59	194
60	195
61	197

n	a(n)
1	10
2	13
3	17
4	26
5	29
6	30
7	34
8	37
9	39
10	41
11	50
12	51
13	53
14	58
15	61
16	65
17	70
18	73
19	74
20	78
21	82
22	85
23	87
24	89
25	91
26	97
27	101
28	102
29	106
30	109
31	110
32	111
33	113
34	119
35	122
36	123
37	125
38	130
39	137
40	143
41	145
42	146
43	149
44	150
45	157
46	159
47	169
48	170
49	173
50	174
51	178
52	181
53	182
54	183
55	185
56	187
57	190
58	193
59	194
60	195
61	197