A031756 Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 78.

1522, 6086, 13692, 24340, 38030, 54762, 74536, 97352, 123210, 152110, 184052, 219036, 257062, 298130, 342240, 389392, 439586, 492822, 549100, 608420, 670782, 736186, 804632, 876120, 950650, 1028222, 1108836, 1192492, 1279190, 1368930

Offset

1,1

Links

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

Mathematica

cf78Q[n_]:=With[{s=Sqrt[n]}, If[IntegerQ[s], 1, Min[ContinuedFraction[s][[2]]]]==78]; Select[Range[1370000], cf78Q] (* Harvey P. Dale, Jan 20 2026 *)

Crossrefs

Sequence in context: A103962 A263983 A387434 * A226702 A318791 A087867

Adjacent sequences: A031753 A031754 A031755 * A031757 A031758 A031759

Keyword

nonn

Author

David W. Wilson

Status

approved