A031418 - cp's OEIS frontend

A031418 Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted then there are a pair of central terms both equal to 5.

n	a(n)
1	73
2	373
3	449
4	565
5	610
6	757
7	1021
8	1145
9	1193
10	1594
11	1669
12	1906
13	2053
14	2074
15	2138
16	2314
17	2477
18	2593
19	2861
20	3065
21	3145
22	4129
23	4346
24	4373
25	4469
26	4498
27	4721
28	5018
29	5114
30	5386
31	5741
32	6025
33	6317
34	6617
35	6737
36	6925
37	7241
38	7489
39	7522
40	7897
41	7978
42	8017
43	8186
44	8314

[73, 373, 449, 565, 610, 757, 1021, 1145, 1193, 1594, 1669, 1906, 2053, 2074, 2138, 2314, 2477, 2593, 2861, 3065, 3145, 4129, 4346, 4373, 4469, 4498, 4721, 5018, 5114, 5386, 5741, 6025, 6317, 6617, 6737, 6925, 7241, 7489, 7522, 7897, 7978, 8017, 8186, 8314]

cp's OEIS Frontend

A031418 Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted then there are a pair of central terms both equal to 5.

Table of values

List of values