A031420 - cp's OEIS frontend

A031420 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 7.

n	a(n)
1	349
2	778
3	1105
4	1237
5	1306
6	1565
7	1721
8	2473
9	3361
10	3706
11	3889
12	4133
13	4985
14	5261
15	5545
16	6217
17	6841
18	6929
19	7165
20	7253
21	7418
22	7754
23	8021
24	8273
25	8369
26	8629
27	9089
28	9274
29	9461
30	10034
31	10229
32	10333
33	10729
34	11245
35	11657
36	12077
37	12842
38	12941
39	13385
40	13730
41	14314

[349, 778, 1105, 1237, 1306, 1565, 1721, 2473, 3361, 3706, 3889, 4133, 4985, 5261, 5545, 6217, 6841, 6929, 7165, 7253, 7418, 7754, 8021, 8273, 8369, 8629, 9089, 9274, 9461, 10034, 10229, 10333, 10729, 11245, 11657, 12077, 12842, 12941, 13385, 13730, 14314]

cp's OEIS Frontend

A031420 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 7.

Table of values

List of values