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A031683 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 95. 0
56669, 110938, 183265, 184981, 274697, 508594, 512881, 653153, 656389, 659633, 664514, 824825, 828461, 1195178, 1203938, 1214933, 1217138, 1411969, 1419106, 1421489, 1426261, 1433434, 1435829, 1438226, 1659673, 1669993, 1899725 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
cf95Q[n_]:=Module[{s=Sqrt[n], cf, len}, cf=If[IntegerQ[s], {1, 1}, ContinuedFraction[ s][[2]]]; len=Length[cf]; OddQ[len]&&cf[[(len+1)/2]] == 95]; Select[Range[2*10^6], cf95Q] (* Harvey P. Dale, Aug 11 2015 *)
CROSSREFS
Sequence in context: A329270 A190836 A288076 * A202568 A145685 A333951
KEYWORD
nonn
AUTHOR
EXTENSIONS
Corrected and definition clarified by Harvey P. Dale, Aug 11 2015
STATUS
approved

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Last modified June 25 13:13 EDT 2024. Contains 373705 sequences. (Running on oeis4.)