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 A115548 #12 Jul 15 2021 09:15:07 %S A115548 91304347826086956521739130434782608695652173913043478261, %T A115548 121739130434782608695652173913043478260869565217391304348, %U A115548 152173913043478260869565217391304347826086956521739130435,182608695652173913043478260869565217391304347826086956522 %N A115548 Numbers k such that k^2 is the concatenation of two numbers m and 7*m. %H A115548 Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/NonRecursions.html">Non Recursions</a> %Y A115548 Cf. A102567, A106497, A115527 - A115556. %K A115548 nonn,base %O A115548 1,1 %A A115548 _Giovanni Resta_, Jan 25 2006