A031705 Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 27.

731, 2920, 6567, 11672, 18235, 26256, 35735, 46672, 59067, 72920, 88231, 105000, 123227, 142912, 164055, 186656, 210715, 236232, 263207, 291640, 321531, 352880, 385687, 419952, 455675, 492856, 531495, 552104, 571592, 594496, 613147, 656160

Offset

1,1

Links

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

Mathematica

lt27Q[n_]:=Module[{sr=Sqrt[n]}, If[IntegerQ[sr], False, Min[ ContinuedFraction[ sr][[2]]]==27]]; Select[Range[660000], lt27Q] (* Harvey P. Dale, May 11 2014 *)

Crossrefs

Sequence in context: A085441 A098292 A031525 * A158396 A098263 A289571

Adjacent sequences: A031702 A031703 A031704 * A031706 A031707 A031708

Keyword

nonn

Author

David W. Wilson

Status

approved