A031601 - cp's OEIS frontend

A031601 Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 13.

n	a(n)
1	409
2	1181
3	2258
4	3562
5	3802
6	3925
7	5305
8	5897
9	8269
10	9829
11	10834
12	11041
13	12389
14	15737
15	16745
16	17785
17	21757
18	23029
19	23633
20	24554
21	25178
22	26869
23	27194
24	27521
25	28181
26	28514
27	28849
28	30554
29	30901
30	32413
31	33853
32	36073
33	36185
34	40841
35	41362
36	41765
37	42170

[409, 1181, 2258, 3562, 3802, 3925, 5305, 5897, 8269, 9829, 10834, 11041, 12389, 15737, 16745, 17785, 21757, 23029, 23633, 24554, 25178, 26869, 27194, 27521, 28181, 28514, 28849, 30554, 30901, 32413, 33853, 36073, 36185, 40841, 41362, 41765, 42170]

cp's OEIS Frontend

A031601 Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 13.

Table of values

List of values