A206587 - cp's OEIS frontend

A206587 Numbers k such that the periodic part of the continued fraction of sqrt(k) has even length.

n	a(n)
1	1
2	3
3	4
4	6
5	7
6	8
7	9
8	11
9	12
10	14
11	15
12	16
13	18
14	19
15	20
16	21
17	22
18	23
19	24
20	25
21	27
22	28
23	30
24	31
25	32
26	33
27	34
28	35
29	36
30	38
31	39
32	40
33	42
34	43
35	44
36	45
37	46
38	47
39	48
40	49
41	51
42	52
43	54
44	55
45	56
46	57
47	59
48	60
49	62
50	63
51	64
52	66
53	67
54	68
55	69
56	70
57	71
58	72
59	75
60	76
61	77
62	78
63	79
64	80
65	81
66	83
67	84

[1, 3, 4, 6, 7, 8, 9, 11, 12, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24, 25, 27, 28, 30, 31, 32, 33, 34, 35, 36, 38, 39, 40, 42, 43, 44, 45, 46, 47, 48, 49, 51, 52, 54, 55, 56, 57, 59, 60, 62, 63, 64, 66, 67, 68, 69, 70, 71, 72, 75, 76, 77, 78, 79, 80, 81, 83, 84]

cp's OEIS Frontend

A206587 Numbers k such that the periodic part of the continued fraction of sqrt(k) has even length.

Table of values

List of values

n	a(n)
1	1
2	3
3	4
4	6
5	7
6	8
7	9
8	11
9	12
10	14
11	15
12	16
13	18
14	19
15	20
16	21
17	22
18	23
19	24
20	25
21	27
22	28
23	30
24	31
25	32
26	33
27	34
28	35
29	36
30	38
31	39
32	40
33	42
34	43
35	44
36	45
37	46
38	47
39	48
40	49
41	51
42	52
43	54
44	55
45	56
46	57
47	59
48	60
49	62
50	63
51	64
52	66
53	67
54	68
55	69
56	70
57	71
58	72
59	75
60	76
61	77
62	78
63	79
64	80
65	81
66	83
67	84

n	a(n)
1	1
2	3
3	4
4	6
5	7
6	8
7	9
8	11
9	12
10	14
11	15
12	16
13	18
14	19
15	20
16	21
17	22
18	23
19	24
20	25
21	27
22	28
23	30
24	31
25	32
26	33
27	34
28	35
29	36
30	38
31	39
32	40
33	42
34	43
35	44
36	45
37	46
38	47
39	48
40	49
41	51
42	52
43	54
44	55
45	56
46	57
47	59
48	60
49	62
50	63
51	64
52	66
53	67
54	68
55	69
56	70
57	71
58	72
59	75
60	76
61	77
62	78
63	79
64	80
65	81
66	83
67	84

n	a(n)
1	1
2	3
3	4
4	6
5	7
6	8
7	9
8	11
9	12
10	14
11	15
12	16
13	18
14	19
15	20
16	21
17	22
18	23
19	24
20	25
21	27
22	28
23	30
24	31
25	32
26	33
27	34
28	35
29	36
30	38
31	39
32	40
33	42
34	43
35	44
36	45
37	46
38	47
39	48
40	49
41	51
42	52
43	54
44	55
45	56
46	57
47	59
48	60
49	62
50	63
51	64
52	66
53	67
54	68
55	69
56	70
57	71
58	72
59	75
60	76
61	77
62	78
63	79
64	80
65	81
66	83
67	84