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 A031610 #14 Aug 18 2021 00:10:32 %S A031610 3161,6133,6449,10690,15497,22073,28114,35633,36389,37153,37538,38314, %T A031610 46157,47017,47885,54265,65554,66578,67093,68129,76801,77354,77909, %U A031610 79586,80149,80714,81281,82421,89533,105817,108425,109741,119297,120677 %N A031610 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 22. %Y A031610 Subsequence of A003814. %K A031610 nonn %O A031610 1,1 %A A031610 _David W. Wilson_ %E A031610 First term 485 removed by _Georg Fischer_, Jun 16 2019