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 A079112 #5 Sep 04 2021 19:46:13
%S A079112 0,1,100,101,110,111,10000,10001,10010,10011,10100,10101,10110,10111,
%T A079112 11000,11001,11010,11011,11100,11101,11110,11111,1000000,1000001,
%U A079112 1000010,1000011,1000100,1000101,1000110,1000111,1001000,1001001
%N A079112 Numbers in binary representation with odd length.
%C A079112 a(n) = A007088(A053738(n)).
%t A079112 Join[{0},Select[FromDigits/@Tuples[{0,1},7],OddQ[IntegerLength[#]]&]] (* _Harvey P. Dale_, Sep 04 2021 *)
%K A079112 nonn,base
%O A079112 0,3
%A A079112 _Reinhard Zumkeller_, Dec 25 2002