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 A176237 #9 Mar 31 2017 10:31:26
%S A176237 3,6,7,9,11,12,13,14,15,18,19,22,23,24,25,26,27,28,29,30,31,33,35,36,
%T A176237 37,38,39,41,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,
%U A176237 62,63,66,67,70,71,72,73,74,75,76,77,78,79,82,83,86,87,88,89,90,91,92,93
%N A176237 Binary expansion of n contains at least one 1-bit at even position and one 1-bit at odd position.
%C A176237 Also numbers neither in A000695 nor in A062880.
%e A176237 The binary expansion of 6 is "110", and has one 1-bit at (odd) position 1 and one 1-bit at (even) position 2; thus 6 appears in the sequence.
%t A176237 ok[n_] := With[{p = Position[IntegerDigits[n, 2], 1]}, AnyTrue[p, OddQ[#[[1]]]&] && AnyTrue[p, EvenQ[#[[1]]]&]]; Select[Range[100], ok] (* _Jean-François Alcover_, Mar 31 2017 *)
%Y A176237 Cf. A000695, A062880.
%K A176237 easy,nonn
%O A176237 1,1
%A A176237 _Rémy Sigrist_, Apr 12 2010