A020371 - OEIS

A020371

Numbers k such that the continued fraction for sqrt(k) has period 32.

463, 508, 764, 913, 956, 967, 974, 989, 1041, 1063, 1121, 1132, 1135, 1219, 1228, 1276, 1336, 1372, 1447, 1555, 1583, 1591, 1678, 1797, 1834, 1912, 1927, 2004, 2044, 2094, 2151, 2155, 2224, 2398, 2416, 2422, 2447, 2586, 2608, 2710, 2722, 2752, 2815, 2864

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..44.

MATHEMATICA

cf32Q[n_]:=Module[{s=Sqrt[n], len}, len=If[IntegerQ[s], 1, Length[ ContinuedFraction[ s][[2]]]]; len==32]; Select[Range[3000], cf32Q] (* Harvey P. Dale, Jan 12 2017 *)

CROSSREFS

Sequence in context: A252251 A139662 A140030 * A234842 A116323 A343542

Adjacent sequences: A020368 A020369 A020370 * A020372 A020373 A020374

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved