A031659 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 71.

62549, 102481, 103765, 104410, 153785, 213613, 284314, 289669, 460045, 465485, 556957, 565945, 568957, 668018, 669653, 676213, 684458, 789169, 790946, 794506, 798074, 799861, 803441, 807029, 808826, 1061741, 1065865, 1078285

Offset

1,1

Links

Table of n, a(n) for n=1..28.

Crossrefs

Sequence in context: A203046 A180163 A180202 * A257150 A257157 A254739

Adjacent sequences: A031656 A031657 A031658 * A031660 A031661 A031662

Keyword

nonn

Author

David W. Wilson

Extensions

First term 5042 removed by Georg Fischer, Jun 16 2019

Status

approved