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 A274341 #20 Jun 26 2016 13:03:35 %S A274341 1,4,7,11,12,13,16,18,21,23,26,28,31,35,36,40,41,45,46,49,50,54,55,59, %T A274341 60,64,69,74,79,84,89,94,97,102,107,112,117,122,127,131,132,136,137, %U A274341 141,142,146,147,151,152,156,157,161,162,166,167,171,172,176,177,181 %N A274341 Numbers that cannot be represented as ror(x)+rol(x), where ror(x)=A038572(x) is x rotated one binary place to the right, rol(x)=A006257(x) is x rotated one binary place to the left. %C A274341 Numbers that are not in A273105. %Y A274341 Cf. A006257, A038572, A273105. %K A274341 nonn,base %O A274341 1,2 %A A274341 _Alex Ratushnyak_, Jun 26 2016