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 A359011 #8 Dec 11 2022 04:48:03 %S A359011 0,231,9426681,8803095102,56017891104,4811618419542 %N A359011 Numbers k such that k^2 + the reversal of k^2 is a square. %Y A359011 Cf. A056964, A061230. %K A359011 nonn,base,hard,more %O A359011 1,2 %A A359011 _Michel Marcus_, Dec 11 2022 %E A359011 a(1)-a(5) from Douglas McNeil and _Zak Seidov_, Nov 09 2010 %E A359011 a(6) from _Giovanni Resta_, Sep 26 2011