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A031594 Numbers n such that continued fraction for sqrt(n) has even period and central term 96. 0
9218, 9234, 9278, 9286, 9302, 9314, 9318, 9326, 9346, 9358, 9382, 9406, 9426, 9446, 9462, 9474, 9502, 9518, 9538, 9558, 9566, 9574, 9598, 9602, 20739, 20811, 20814, 20841, 20847, 20877, 20892, 20901, 20913, 20919, 20937, 20949, 20964, 20973, 20991 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..39.

MATHEMATICA

cf96Q[n_]:=Module[{s=Sqrt[n], cf, len}, cf=If[IntegerQ[s], {1}, ContinuedFraction[ s][[2]]]; len=Length[cf]; EvenQ[len]&&cf[[len/2]] == 96]; Select[Range[21000], cf96Q] (* Harvey P. Dale, May 15 2018 *)

CROSSREFS

Sequence in context: A204103 A209595 A223303 * A262508 A272596 A189984

Adjacent sequences:  A031591 A031592 A031593 * A031595 A031596 A031597

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified February 26 21:29 EST 2020. Contains 332295 sequences. (Running on oeis4.)