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 A091445 #10 Jul 28 2025 16:53:59
%S A091445 0,1,0,0,1,0,0,1,1,1,0,0,0,1,0,0,0,1,0,0,0,1,1,1,0,1,0,1,0,1,1,1,1,1,
%T A091445 0,0,0,0,1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1,1,1,0,0,1,0,1,0,0,1,1,0,1,0,
%U A091445 0,1,0,1,0,1,0,0,1,1,1,1,1,0,1,1,0,1,1,0,1,1,0,1,1,1,1,1,1,1
%N A091445 Concatenate binary vectors ordered first by length, then by the number of 1's and finally by a 'reverse' lexicographical ordering (read words from right to left).
%H A091445 Paolo Xausa, <a href="/A091445/b091445.txt">Table of n, a(n) for n = 0..18433</a>
%t A091445 Flatten[Table[Map[Reverse, SortBy[IntegerDigits[Range[0, 2^k - 1], 2, k],Total]], {k, 4}]] (* _Paolo Xausa_, Jul 28 2025 *)
%Y A091445 Cf. A076478, A091444, A091446, A091447.
%K A091445 easy,nonn
%O A091445 0,1
%A A091445 _Paul Boddington_, Jan 10 2004