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 A057930 #1 May 16 2003 03:00:00 %S A057930 7,13,14,15,25,26,27,29,30,31,45,46,47,49,50,51,53,54,55,61,62,63,89, %T A057930 90,91,93,94,95,125,126,127,225,226,227,229,230,231,237,238,239,249, %U A057930 250,251,253,254,255,397,398,399,401,402,403,405,406,407,413,414,415 %N A057930 Sequence b(n) mentioned in A057929. %Y A057930 Cf. A057929, A057931. %K A057930 easy,nonn %O A057930 1,1 %A A057930 Larry Reeves (larryr(AT)acm.org), Oct 03 2000