A172000 - cp's OEIS frontend

A172000 Nonsquare positive integers n such that the fundamental unit of quadratic field Q(sqrt(n)) has norm -1.

n	a(n)
1	2
2	5
3	8
4	10
5	13
6	17
7	18
8	20
9	26
10	29
11	32
12	37
13	40
14	41
15	45
16	50
17	52
18	53
19	58
20	61
21	65
22	68
23	72
24	73
25	74
26	80
27	82
28	85
29	89
30	90
31	97
32	98
33	101
34	104
35	106
36	109
37	113
38	116
39	117
40	122
41	125
42	128
43	130
44	137
45	145
46	148
47	149
48	153
49	157
50	160
51	162
52	164
53	170
54	173
55	180
56	181
57	185
58	193
59	197
60	200

[2, 5, 8, 10, 13, 17, 18, 20, 26, 29, 32, 37, 40, 41, 45, 50, 52, 53, 58, 61, 65, 68, 72, 73, 74, 80, 82, 85, 89, 90, 97, 98, 101, 104, 106, 109, 113, 116, 117, 122, 125, 128, 130, 137, 145, 148, 149, 153, 157, 160, 162, 164, 170, 173, 180, 181, 185, 193, 197, 200]

cp's OEIS Frontend

A172000 Nonsquare positive integers n such that the fundamental unit of quadratic field Q(sqrt(n)) has norm -1.

Table of values

List of values

n	a(n)
1	2
2	5
3	8
4	10
5	13
6	17
7	18
8	20
9	26
10	29
11	32
12	37
13	40
14	41
15	45
16	50
17	52
18	53
19	58
20	61
21	65
22	68
23	72
24	73
25	74
26	80
27	82
28	85
29	89
30	90
31	97
32	98
33	101
34	104
35	106
36	109
37	113
38	116
39	117
40	122
41	125
42	128
43	130
44	137
45	145
46	148
47	149
48	153
49	157
50	160
51	162
52	164
53	170
54	173
55	180
56	181
57	185
58	193
59	197
60	200

n	a(n)
1	2
2	5
3	8
4	10
5	13
6	17
7	18
8	20
9	26
10	29
11	32
12	37
13	40
14	41
15	45
16	50
17	52
18	53
19	58
20	61
21	65
22	68
23	72
24	73
25	74
26	80
27	82
28	85
29	89
30	90
31	97
32	98
33	101
34	104
35	106
36	109
37	113
38	116
39	117
40	122
41	125
42	128
43	130
44	137
45	145
46	148
47	149
48	153
49	157
50	160
51	162
52	164
53	170
54	173
55	180
56	181
57	185
58	193
59	197
60	200

n	a(n)
1	2
2	5
3	8
4	10
5	13
6	17
7	18
8	20
9	26
10	29
11	32
12	37
13	40
14	41
15	45
16	50
17	52
18	53
19	58
20	61
21	65
22	68
23	72
24	73
25	74
26	80
27	82
28	85
29	89
30	90
31	97
32	98
33	101
34	104
35	106
36	109
37	113
38	116
39	117
40	122
41	125
42	128
43	130
44	137
45	145
46	148
47	149
48	153
49	157
50	160
51	162
52	164
53	170
54	173
55	180
56	181
57	185
58	193
59	197
60	200