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A020397 Numbers k such that the continued fraction for sqrt(k) has period 58. 1
1141, 1531, 2131, 2531, 2653, 2683, 2692, 2699, 2721, 3011, 3013, 3187, 3337, 3494, 3539, 3641, 3734, 4213, 4401, 4507, 4531, 4541, 4547, 4593, 4654, 4693, 4726, 4781, 4786, 4931, 5051, 5129, 5156, 5224, 5254, 5272, 5409, 5414, 5470, 5515, 5517, 5566 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi and Zak Seidov, Table of n, a(n) for n = 1..1000 (first 600 terms from Vincenzo Librandi)

MATHEMATICA

Select[Range[6000], !IntegerQ[Sqrt[#]]&&Length[ContinuedFraction[Sqrt[#]][[2]]]==58&] (* Harvey P. Dale, Feb 27 2012 *)

CROSSREFS

Cf. A003285.

Sequence in context: A232133 A261572 A252476 * A132410 A252428 A251773

Adjacent sequences: A020394 A020395 A020396 * A020398 A020399 A020400

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified December 3 13:56 EST 2022. Contains 358534 sequences. (Running on oeis4.)