A267857 - cp's OEIS frontend

A267857 Length of the period of the continued fraction for the square root of D, the discriminant of indefinite binary quadratic forms. D is given in A079896.

n	a(n)
1	1
2	2
3	2
4	5
5	1
6	2
7	6
8	2
9	4
10	5
11	4
12	4
13	1
14	2
15	3
16	8
17	6
18	2
19	6
20	5
21	2
22	6
23	4
24	11
25	1
26	2
27	8
28	2
29	7
30	12
31	6
32	2
33	2
34	5
35	6
36	5
37	8
38	10
39	4
40	11
41	1
42	2
43	2
44	8
45	15
46	6
47	9
48	10
49	6
50	2
51	16
52	5
53	4
54	10
55	2
56	16
57	4
58	9
59	4
60	4
61	1
62	2
63	9
64	2
65	8
66	2
67	17
68	8
69	10
70	6
71	6
72	2
73	16
74	5
75	4
76	8
77	4
78	21

[1, 2, 2, 5, 1, 2, 6, 2, 4, 5, 4, 4, 1, 2, 3, 8, 6, 2, 6, 5, 2, 6, 4, 11, 1, 2, 8, 2, 7, 12, 6, 2, 2, 5, 6, 5, 8, 10, 4, 11, 1, 2, 2, 8, 15, 6, 9, 10, 6, 2, 16, 5, 4, 10, 2, 16, 4, 9, 4, 4, 1, 2, 9, 2, 8, 2, 17, 8, 10, 6, 6, 2, 16, 5, 4, 8, 4, 21]

cp's OEIS Frontend

A267857 Length of the period of the continued fraction for the square root of D, the discriminant of indefinite binary quadratic forms. D is given in A079896.

Table of values

List of values

n	a(n)
1	1
2	2
3	2
4	5
5	1
6	2
7	6
8	2
9	4
10	5
11	4
12	4
13	1
14	2
15	3
16	8
17	6
18	2
19	6
20	5
21	2
22	6
23	4
24	11
25	1
26	2
27	8
28	2
29	7
30	12
31	6
32	2
33	2
34	5
35	6
36	5
37	8
38	10
39	4
40	11
41	1
42	2
43	2
44	8
45	15
46	6
47	9
48	10
49	6
50	2
51	16
52	5
53	4
54	10
55	2
56	16
57	4
58	9
59	4
60	4
61	1
62	2
63	9
64	2
65	8
66	2
67	17
68	8
69	10
70	6
71	6
72	2
73	16
74	5
75	4
76	8
77	4
78	21

n	a(n)
1	1
2	2
3	2
4	5
5	1
6	2
7	6
8	2
9	4
10	5
11	4
12	4
13	1
14	2
15	3
16	8
17	6
18	2
19	6
20	5
21	2
22	6
23	4
24	11
25	1
26	2
27	8
28	2
29	7
30	12
31	6
32	2
33	2
34	5
35	6
36	5
37	8
38	10
39	4
40	11
41	1
42	2
43	2
44	8
45	15
46	6
47	9
48	10
49	6
50	2
51	16
52	5
53	4
54	10
55	2
56	16
57	4
58	9
59	4
60	4
61	1
62	2
63	9
64	2
65	8
66	2
67	17
68	8
69	10
70	6
71	6
72	2
73	16
74	5
75	4
76	8
77	4
78	21

n	a(n)
1	1
2	2
3	2
4	5
5	1
6	2
7	6
8	2
9	4
10	5
11	4
12	4
13	1
14	2
15	3
16	8
17	6
18	2
19	6
20	5
21	2
22	6
23	4
24	11
25	1
26	2
27	8
28	2
29	7
30	12
31	6
32	2
33	2
34	5
35	6
36	5
37	8
38	10
39	4
40	11
41	1
42	2
43	2
44	8
45	15
46	6
47	9
48	10
49	6
50	2
51	16
52	5
53	4
54	10
55	2
56	16
57	4
58	9
59	4
60	4
61	1
62	2
63	9
64	2
65	8
66	2
67	17
68	8
69	10
70	6
71	6
72	2
73	16
74	5
75	4
76	8
77	4
78	21