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 A057924 #4 Aug 14 2017 03:11:10 %S A057924 2,3,5,6,7,13,14,15,25,26,27,29,30,31,45,46,47,49,50,51,53,54,55,61, %T A057924 62,63,89,90,91,93,94,95,125,126,127,225,226,227,229,230,231,237,238, %U A057924 239,249,250,251,253,254,255,397,398,399,401,402,403,405,406,407,413,414 %N A057924 Sequence b(n) mentioned in A057923. %H A057924 Robert Israel, <a href="/A057924/b057924.txt">Table of n, a(n) for n = 1..10000</a> %p A057924 A[0]:= 0: A[1]:= 2: B[1]:= 2: %p A057924 for n from 2 to 100 do %p A057924 for k from B[n-1]-A[n-1] do %p A057924 b:= Bits:-Or(A[n-1],k); %p A057924 if b > B[n-1] then A[n]:= k; B[n]:= b; break fi %p A057924 od; %p A057924 od: %p A057924 seq(B[n],n=1..100); # _Robert Israel_, Aug 13 2017 %Y A057924 Cf. A057923, A057925. %K A057924 easy,nonn %O A057924 1,1 %A A057924 Larry Reeves (larryr(AT)acm.org), Oct 03 2000