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A020412 Numbers k such that the continued fraction for sqrt(k) has period 73. 0
3541, 5849, 7165, 7501, 8933, 9473, 9857, 11497, 13753, 13901, 14218, 15793, 17597, 18917, 20609, 24202, 24746, 25121, 25906, 25913, 26177, 28465, 29437, 31466, 33185, 33386, 33562, 34913, 35989, 38293, 39565, 39626, 40345, 40762, 41546, 41938, 44761 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..37.

MATHEMATICA

cfp73Q[n_]:=Module[{s=Sqrt[n]}, !IntegerQ[s]&&Length[ContinuedFraction[s][[2]]] == 73]; Select[Range[45000], cfp73Q] (* Harvey P. Dale, Feb 26 2013 *)

CROSSREFS

Cf. A003285.

Sequence in context: A035779 A108003 A176139 * A220985 A252989 A253309

Adjacent sequences:  A020409 A020410 A020411 * A020413 A020414 A020415

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified August 17 21:56 EDT 2022. Contains 356189 sequences. (Running on oeis4.)