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 A124404 #3 Mar 30 2012 18:49:08 %S A124404 10,12,13,14,16,18,19,20,23,24,25,26,28,29,30,32,34,35,36,37,38,39,40, %T A124404 41,42,43,46,47,48,49,50,52,53,54,56,57,58,59,60,61,62,64,67,68,69,70, %U A124404 71,72,74,75,76,78,79,80,81,82,83,84,86,87,89,90,91,92,94,95,96,97,98 %N A124404 Nonpalindromes in base 10 that are non-palindromes in base 2. %t A124404 Select[Range[100], Reverse[IntegerDigits[ # ]] != IntegerDigits[ # ] && Reverse[IntegerDigits[ #, 2]] != IntegerDigits[ #, 2] &] %Y A124404 Cf. A007632 = numbers that are palindromic in bases 2 and 10. %K A124404 base,nonn %O A124404 1,1 %A A124404 _Tanya Khovanova_, Dec 26 2006