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 A182234 #31 Oct 28 2014 11:23:21
%S A182234 0,1,3,5,85,107,257,5049,9201,11253,11757,210099,399171,512607,786435,
%T A182234 12916899,19992857,22468309,1052109663,15935958711,24051338445,
%U A182234 37344016593,71859215265,72822171105,1566399158893,3425211644643
%N A182234 Numbers that are palindromic in bases 2 and 7.
%C A182234 Intersection of A006995 and A029954. - _Michel Marcus_, Oct 09 2014
%H A182234 Ray Chandler, <a href="/A182234/b182234.txt">Table of n, a(n) for n = 1..31</a> (terms < 10^18)
%e A182234 786435 base 2 = 11000000000000000011 and 786435 base 7 = 6453546.
%t A182234 b1 = 2; b2 = 7; lst = {}; Do[d1 = IntegerDigits[n, b1]; d2 = IntegerDigits[n, b2]; If[d1 == Reverse[d1] && d2 == Reverse[d2], AppendTo[lst, n]], {n, 1000000}]; lst (* _T. D. Noe_, Apr 19 2012 *)
%Y A182234 Cf. A006995 (base 2), A029954 (base 7).
%Y A182234 Cf. A060792 (base 2 and 3), A097856 (base 2 and 4).
%K A182234 nonn,base
%O A182234 1,3
%A A182234 _Alex Ratushnyak_, Apr 19 2012
%E A182234 a(19)-a(28) from _Donovan Johnson_, Apr 27 2012
%E A182234 b-file to 31 terms from _Ray Chandler_, Oct 27 2014