This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A031626 #15 Aug 18 2021 00:10:32 %S A031626 3373,9241,30010,30706,44221,45065,61673,62669,82021,82594,85489, %T A031626 105914,107873,132857,160441,192373,195893,196778,198554,200338, %U A031626 201233,227201,228154,230066,232949,233914,271129,305545,307757,309977,314441 %N A031626 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 38. %Y A031626 Subsequence of A003814. %K A031626 nonn %O A031626 1,1 %A A031626 _David W. Wilson_ %E A031626 First term 1445 removed by _Georg Fischer_, Jun 16 2019