A013647 - cp's OEIS frontend

A013647 Numbers k such that the period of the continued fraction for sqrt(k) contains no 1's.

n	a(n)
1	2
2	5
3	6
4	10
5	11
6	12
7	17
8	18
9	20
10	26
11	27
12	28
13	30
14	37
15	38
16	39
17	40
18	41
19	42
20	50
21	51
22	55
23	56
24	65
25	66
26	68
27	72
28	82
29	83
30	84
31	87
32	89
33	90
34	101
35	102
36	104
37	105
38	110
39	122
40	123
41	126
42	128
43	130
44	131
45	132
46	145
47	146
48	147
49	148
50	150
51	152
52	155
53	156
54	170
55	171
56	174
57	177
58	180
59	182
60	197
61	198
62	200
63	203

[2, 5, 6, 10, 11, 12, 17, 18, 20, 26, 27, 28, 30, 37, 38, 39, 40, 41, 42, 50, 51, 55, 56, 65, 66, 68, 72, 82, 83, 84, 87, 89, 90, 101, 102, 104, 105, 110, 122, 123, 126, 128, 130, 131, 132, 145, 146, 147, 148, 150, 152, 155, 156, 170, 171, 174, 177, 180, 182, 197, 198, 200, 203]

cp's OEIS Frontend

A013647 Numbers k such that the period of the continued fraction for sqrt(k) contains no 1's.

Table of values

List of values

n	a(n)
1	2
2	5
3	6
4	10
5	11
6	12
7	17
8	18
9	20
10	26
11	27
12	28
13	30
14	37
15	38
16	39
17	40
18	41
19	42
20	50
21	51
22	55
23	56
24	65
25	66
26	68
27	72
28	82
29	83
30	84
31	87
32	89
33	90
34	101
35	102
36	104
37	105
38	110
39	122
40	123
41	126
42	128
43	130
44	131
45	132
46	145
47	146
48	147
49	148
50	150
51	152
52	155
53	156
54	170
55	171
56	174
57	177
58	180
59	182
60	197
61	198
62	200
63	203

n	a(n)
1	2
2	5
3	6
4	10
5	11
6	12
7	17
8	18
9	20
10	26
11	27
12	28
13	30
14	37
15	38
16	39
17	40
18	41
19	42
20	50
21	51
22	55
23	56
24	65
25	66
26	68
27	72
28	82
29	83
30	84
31	87
32	89
33	90
34	101
35	102
36	104
37	105
38	110
39	122
40	123
41	126
42	128
43	130
44	131
45	132
46	145
47	146
48	147
49	148
50	150
51	152
52	155
53	156
54	170
55	171
56	174
57	177
58	180
59	182
60	197
61	198
62	200
63	203

n	a(n)
1	2
2	5
3	6
4	10
5	11
6	12
7	17
8	18
9	20
10	26
11	27
12	28
13	30
14	37
15	38
16	39
17	40
18	41
19	42
20	50
21	51
22	55
23	56
24	65
25	66
26	68
27	72
28	82
29	83
30	84
31	87
32	89
33	90
34	101
35	102
36	104
37	105
38	110
39	122
40	123
41	126
42	128
43	130
44	131
45	132
46	145
47	146
48	147
49	148
50	150
51	152
52	155
53	156
54	170
55	171
56	174
57	177
58	180
59	182
60	197
61	198
62	200
63	203