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Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 75.
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%I #12 Aug 18 2021 00:10:32

%S 69218,114325,116362,171517,173177,238313,242233,317194,320581,322849,

%T 409889,510157,513017,515885,518761,621385,624541,634057,748754,

%U 757429,760913,762658,882346,886106,887989,895541,1037053,1184585

%N Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 75.

%K nonn

%O 1,1

%A _David W. Wilson_

%E First term 5626 removed by _Georg Fischer_, Jun 16 2019