A003654 - cp's OEIS frontend

A003654 Squarefree integers m such that the fundamental unit of Q(sqrt(m)) has norm -1. Also, squarefree integers m such that the Pell equation x^2 - m*y^2 = -1 is soluble.

n	a(n)
1	2
2	5
3	10
4	13
5	17
6	26
7	29
8	37
9	41
10	53
11	58
12	61
13	65
14	73
15	74
16	82
17	85
18	89
19	97
20	101
21	106
22	109
23	113
24	122
25	130
26	137
27	145
28	149
29	157
30	170
31	173
32	181
33	185
34	193
35	197
36	202
37	218
38	226
39	229
40	233
41	241
42	257
43	265
44	269
45	274
46	277
47	281
48	290
49	293
50	298
51	313
52	314
53	317
54	337
55	346
56	349
57	353
58	362

[2, 5, 10, 13, 17, 26, 29, 37, 41, 53, 58, 61, 65, 73, 74, 82, 85, 89, 97, 101, 106, 109, 113, 122, 130, 137, 145, 149, 157, 170, 173, 181, 185, 193, 197, 202, 218, 226, 229, 233, 241, 257, 265, 269, 274, 277, 281, 290, 293, 298, 313, 314, 317, 337, 346, 349, 353, 362]

cp's OEIS Frontend

A003654 Squarefree integers m such that the fundamental unit of Q(sqrt(m)) has norm -1. Also, squarefree integers m such that the Pell equation x^2 - m*y^2 = -1 is soluble.

Table of values

List of values

n	a(n)
1	2
2	5
3	10
4	13
5	17
6	26
7	29
8	37
9	41
10	53
11	58
12	61
13	65
14	73
15	74
16	82
17	85
18	89
19	97
20	101
21	106
22	109
23	113
24	122
25	130
26	137
27	145
28	149
29	157
30	170
31	173
32	181
33	185
34	193
35	197
36	202
37	218
38	226
39	229
40	233
41	241
42	257
43	265
44	269
45	274
46	277
47	281
48	290
49	293
50	298
51	313
52	314
53	317
54	337
55	346
56	349
57	353
58	362

n	a(n)
1	2
2	5
3	10
4	13
5	17
6	26
7	29
8	37
9	41
10	53
11	58
12	61
13	65
14	73
15	74
16	82
17	85
18	89
19	97
20	101
21	106
22	109
23	113
24	122
25	130
26	137
27	145
28	149
29	157
30	170
31	173
32	181
33	185
34	193
35	197
36	202
37	218
38	226
39	229
40	233
41	241
42	257
43	265
44	269
45	274
46	277
47	281
48	290
49	293
50	298
51	313
52	314
53	317
54	337
55	346
56	349
57	353
58	362

n	a(n)
1	2
2	5
3	10
4	13
5	17
6	26
7	29
8	37
9	41
10	53
11	58
12	61
13	65
14	73
15	74
16	82
17	85
18	89
19	97
20	101
21	106
22	109
23	113
24	122
25	130
26	137
27	145
28	149
29	157
30	170
31	173
32	181
33	185
34	193
35	197
36	202
37	218
38	226
39	229
40	233
41	241
42	257
43	265
44	269
45	274
46	277
47	281
48	290
49	293
50	298
51	313
52	314
53	317
54	337
55	346
56	349
57	353
58	362