A031640 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 52.

17449, 55306, 55777, 83065, 84221, 115769, 117133, 153889, 155461, 157834, 196538, 198314, 200098, 250361, 252365, 302941, 309577, 360529, 368978, 370193, 424426, 425729, 427034, 428341, 430961, 433589, 434906, 438869, 504829, 507673

Offset

1,1

Links

Table of n, a(n) for n=1..30.

Crossrefs

Sequence in context: A322858 A251465 A278004 * A236006 A190758 A034624

Adjacent sequences: A031637 A031638 A031639 * A031641 A031642 A031643

Keyword

nonn

Author

David W. Wilson

Extensions

First term 2705 removed by Georg Fischer, Jun 16 2019

Status

approved