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 A261925 #7 Sep 17 2015 14:29:26 %S A261925 10,12,13,14,15,16,17,18,110,132,143,154,165,176,187,198,302,312,322, %T A261925 332,342,352,362,372,382,403,413,423,433,443,453,463,473,483,504,514, %U A261925 524,534,544,554,564,574,584,605,615,625,635,645,655,665,675,685,706,716,726 %N A261925 Nonpalindromes that are the sum of two nonzero palindromes of the same length. %Y A261925 Cf. A002113, A261921, A261924, etc. %K A261925 nonn,base %O A261925 1,1 %A A261925 _David Applegate_ and _N. J. A. Sloane_, Sep 17 2015