A031609 - cp's OEIS frontend

A031609 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 21.

n	a(n)
1	1033
2	5674
3	9106
4	9685
5	13577
6	14045
7	19213
8	19769
9	20333
10	25189
11	26794
12	33413
13	33778
14	40361
15	41165
16	42797
17	43625
18	51517
19	53341
20	59093
21	59578
22	61538
23	63029
24	64033
25	69269
26	70321
27	71381
28	71914
29	72986
30	74066
31	74609
32	75154
33	75701
34	93257
35	94477
36	96941

[1033, 5674, 9106, 9685, 13577, 14045, 19213, 19769, 20333, 25189, 26794, 33413, 33778, 40361, 41165, 42797, 43625, 51517, 53341, 59093, 59578, 61538, 63029, 64033, 69269, 70321, 71381, 71914, 72986, 74066, 74609, 75154, 75701, 93257, 94477, 96941]

cp's OEIS Frontend

A031609 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 21.

Table of values

List of values