A308780 - cp's OEIS frontend

A308780 First element of the periodic part of the continued fraction expansion of sqrt(k), where the period is 2.

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

[1, 2, 1, 3, 2, 1, 4, 2, 1, 5, 2, 1, 6, 4, 3, 2, 1, 7, 2, 1, 8, 4, 2, 1, 9, 6, 3, 2, 1, 10, 5, 4, 2, 1, 11, 2, 1, 12, 8, 6, 4, 3, 2, 1, 13, 2, 1, 14, 7, 4, 2, 1, 15, 10, 6, 5, 3, 2, 1, 16, 8, 4, 2, 1, 17, 2, 1, 18, 12, 9, 6, 4, 3, 2, 1, 19, 2, 1]

cp's OEIS Frontend

A308780 First element of the periodic part of the continued fraction expansion of sqrt(k), where the period is 2.

Table of values

List of values

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

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

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