A031642 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 54.

6733, 18521, 36149, 36913, 59617, 61090, 88925, 90121, 124073, 165874, 167506, 211889, 264557, 270761, 272845, 323065, 327625, 388658, 397429, 399953, 457601, 458954, 464386, 465749, 467114, 471221, 615497, 618637, 704882, 706561

Offset

1,1

Links

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

Crossrefs

Sequence in context: A049507 A064160 A249463 * A257486 A345591 A345849

Adjacent sequences: A031639 A031640 A031641 * A031643 A031644 A031645

Keyword

nonn

Author

David W. Wilson

Extensions

First term 2917 removed by Georg Fischer, Jun 16 2019

Status

approved