A146327 - cp's OEIS frontend

A146327 Numbers k such that the continued fraction of (1 + sqrt(k))/2 has period 2.

n	a(n)
1	2
2	3
3	10
4	11
5	12
6	15
7	21
8	26
9	27
10	30
11	35
12	45
13	50
14	51
15	56
16	63
17	77
18	82
19	83
20	84
21	87
22	90
23	93
24	99
25	117
26	122
27	123
28	132
29	143
30	165
31	170
32	171
33	182
34	195
35	221
36	226
37	227
38	228
39	230
40	231
41	235
42	237
43	240
44	245
45	255
46	285
47	290
48	291
49	306
50	323
51	357
52	362
53	363
54	380
55	399
56	437
57	442
58	443

[2, 3, 10, 11, 12, 15, 21, 26, 27, 30, 35, 45, 50, 51, 56, 63, 77, 82, 83, 84, 87, 90, 93, 99, 117, 122, 123, 132, 143, 165, 170, 171, 182, 195, 221, 226, 227, 228, 230, 231, 235, 237, 240, 245, 255, 285, 290, 291, 306, 323, 357, 362, 363, 380, 399, 437, 442, 443]

cp's OEIS Frontend

A146327 Numbers k such that the continued fraction of (1 + sqrt(k))/2 has period 2.

Table of values

List of values

n	a(n)
1	2
2	3
3	10
4	11
5	12
6	15
7	21
8	26
9	27
10	30
11	35
12	45
13	50
14	51
15	56
16	63
17	77
18	82
19	83
20	84
21	87
22	90
23	93
24	99
25	117
26	122
27	123
28	132
29	143
30	165
31	170
32	171
33	182
34	195
35	221
36	226
37	227
38	228
39	230
40	231
41	235
42	237
43	240
44	245
45	255
46	285
47	290
48	291
49	306
50	323
51	357
52	362
53	363
54	380
55	399
56	437
57	442
58	443

n	a(n)
1	2
2	3
3	10
4	11
5	12
6	15
7	21
8	26
9	27
10	30
11	35
12	45
13	50
14	51
15	56
16	63
17	77
18	82
19	83
20	84
21	87
22	90
23	93
24	99
25	117
26	122
27	123
28	132
29	143
30	165
31	170
32	171
33	182
34	195
35	221
36	226
37	227
38	228
39	230
40	231
41	235
42	237
43	240
44	245
45	255
46	285
47	290
48	291
49	306
50	323
51	357
52	362
53	363
54	380
55	399
56	437
57	442
58	443

n	a(n)
1	2
2	3
3	10
4	11
5	12
6	15
7	21
8	26
9	27
10	30
11	35
12	45
13	50
14	51
15	56
16	63
17	77
18	82
19	83
20	84
21	87
22	90
23	93
24	99
25	117
26	122
27	123
28	132
29	143
30	165
31	170
32	171
33	182
34	195
35	221
36	226
37	227
38	228
39	230
40	231
41	235
42	237
43	240
44	245
45	255
46	285
47	290
48	291
49	306
50	323
51	357
52	362
53	363
54	380
55	399
56	437
57	442
58	443