A031639 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 51.

32449, 52981, 54370, 80777, 110393, 150769, 151546, 191258, 192133, 236557, 238505, 242425, 289885, 296377, 348629, 352178, 356938, 407669, 411506, 412789, 414074, 417941, 420529, 479593, 487933, 548441, 554377, 560345, 566345, 629810

Offset

1,1

Links

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

Crossrefs

Sequence in context: A156421 A156423 A236656 * A233680 A243857 A028240

Adjacent sequences: A031636 A031637 A031638 * A031640 A031641 A031642

Keyword

nonn

Author

David W. Wilson

Extensions

First term 2602 removed by Georg Fischer, Jun 16 2019

Status

approved