A031569 that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 71.

5043, 5051, 5059, 5087, 5091, 5099, 5107, 5119, 5139, 5147, 5163, 5167, 5171, 5179, 5203, 5227, 5231, 5251, 5259, 5279, 5283, 5287, 5303, 5311, 5323, 5327, 20168, 20200, 20288, 20320, 20352, 20360, 20392, 20456, 20480, 20488, 20512, 20544, 20576, 20608

Offset

1,1

Links

Table of n, a(n) for n=1..40.

Crossrefs

Sequence in context: A200730 A229674 A243133 * A031749 A229857 A155145

Adjacent sequences: A031566 A031567 A031568 * A031570 A031571 A031572

Keyword

nonn

Author

David W. Wilson

Status

approved