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 A166938 #7 Mar 11 2014 01:32:49 %S A166938 2,10,12,20,26,38,40,42,52,56,58,68,77,84,89,104,106,110,116,137,138, %T A166938 142,145,149,150,154,166,168,169,170,174,178,196,204,212,220,232,234, %U A166938 240,268,275,277,285,291,299,300,308,315,333,336,337,339,340,348,357 %N A166938 Those positive integers that are both in sequence A166936 and in sequence A166937. %C A166938 Each integer in this sequence, when written in binary, contains at least two palindromic substrings that are tied for the longest such substring, obviously. %Y A166938 Cf. A050430, A166936, A166937. %K A166938 base,nonn %O A166938 1,1 %A A166938 _Leroy Quet_, Oct 24 2009 %E A166938 Extended by _Ray Chandler_, Mar 11 2010