A031605 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 17.

6010, 6322, 6481, 9337, 12713, 16609, 17386, 18181, 21898, 22193, 22789, 23393, 26605, 27917, 28585, 32125, 34297, 39733, 40529, 41333, 41738, 42554, 45569, 45994, 46421, 48149, 49466, 49909, 53629, 57373, 59293, 61357, 65357, 66377, 70130, 70657

Offset

1,1

Links

Table of n, a(n) for n=1..36.

Crossrefs

Subsequence of A003814.

Sequence in context: A115429 A046395 A143043 * A239176 A236975 A206113

Adjacent sequences: A031602 A031603 A031604 * A031606 A031607 A031608

Keyword

nonn

Author

David W. Wilson

Extensions

First term 290 removed by Georg Fischer, Jun 16 2019

Status

approved