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 A027573 #10 Aug 11 2024 14:41:29 %S A027573 4,11,37,566,1736,8339,16084,17552,17932,36997,40441,119811,173736, %T A027573 378811,1328120,1751496,1775706,4427780,8211879,17909282,40439557 %N A027573 Numbers n such that n^2 + (n+1)^2 + (n+2)^2 is palindromic. %H A027573 P. De Geest, <a href="https://www.worldofnumbers.com/sumsquare.htm">Palindromic Sums of Squares of Consecutive Integers</a> %Y A027573 Cf. A027574. %K A027573 nonn,base %O A027573 1,1 %A A027573 _Patrick De Geest_ %E A027573 a(17) corrected and a(18)-a(21) from _Donovan Johnson_, Aug 26 2012