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A020420 Numbers n such that continued fraction for sqrt(n) has period 81. 0

%I

%S 3169,3697,5233,6269,6521,9521,9754,9946,10169,12149,12202,12385,

%T 13738,15461,15706,15898,17321,18922,19853,20065,20341,21977,21985,

%U 23333,24154,24457,24953,25013,25034,25181,27109,27781,27802,28114,28249,28786,28873

%N Numbers n such that continued fraction for sqrt(n) has period 81.

%K nonn

%O 1,1

%A _David W. Wilson_

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Last modified July 21 19:25 EDT 2019. Contains 325199 sequences. (Running on oeis4.)