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 A031624 #14 Aug 18 2021 00:10:32 %S A031624 16178,16433,26650,26977,40121,40925,56813,74209,75301,94538,95153, %T A031624 97633,120077,121465,122861,150985,176929,178613,204026,204929,208561, %U A031624 209474,210389,211306,214069,240829,279625,283865,285997,288137,315682 %N A031624 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 36. %Y A031624 Subsequence of A003814. %K A031624 nonn %O A031624 1,1 %A A031624 _David W. Wilson_ %E A031624 First term 1297 removed by _Georg Fischer_, Jun 16 2019