A020420 - OEIS

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A020420

Numbers k such that the continued fraction for sqrt(k) has period 81.

3169, 3697, 5233, 6269, 6521, 9521, 9754, 9946, 10169, 12149, 12202, 12385, 13738, 15461, 15706, 15898, 17321, 18922, 19853, 20065, 20341, 21977, 21985, 23333, 24154, 24457, 24953, 25013, 25034, 25181, 27109, 27781, 27802, 28114, 28249, 28786, 28873

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

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

CROSSREFS

Sequence in context: A140350 A309024 A217247 * A155484 A345599 A345858

Adjacent sequences: A020417 A020418 A020419 * A020421 A020422 A020423

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved