A031406 - cp's OEIS frontend

A031406 Numbers k such that the continued fraction for sqrt(k) has even period 2*m and the m-th term of the periodic part is 3.

n	a(n)
1	11
2	19
3	23
4	40
5	87
6	96
7	152
8	159
9	216
10	219
11	235
12	335
13	336
14	344
15	392
16	415
17	455
18	515
19	535
20	567
21	592
22	615
23	688
24	707
25	747
26	816
27	848
28	875
29	888
30	920
31	927
32	944
33	976
34	1072
35	1080
36	1099
37	1111
38	1143
39	1183
40	1199
41	1200
42	1211
43	1243
44	1320
45	1328
46	1359
47	1360
48	1456
49	1507
50	1547

[11, 19, 23, 40, 87, 96, 152, 159, 216, 219, 235, 335, 336, 344, 392, 415, 455, 515, 535, 567, 592, 615, 688, 707, 747, 816, 848, 875, 888, 920, 927, 944, 976, 1072, 1080, 1099, 1111, 1143, 1183, 1199, 1200, 1211, 1243, 1320, 1328, 1359, 1360, 1456, 1507, 1547]

cp's OEIS Frontend

A031406 Numbers k such that the continued fraction for sqrt(k) has even period 2*m and the m-th term of the periodic part is 3.

Table of values

List of values