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 A125086 #6 Mar 20 2015 19:08:11 %S A125086 6,14,22,26,28,30,38,46,54,58,60,62,70,78,86,90,92,94,102,106,108,110, %T A125086 114,116,118,120,122,124,126,134,142,150,154,156,158,166,174,182,186, %U A125086 188,190,198,206,214,218,220,222,230,234,236,238,242,244 %N A125086 Even numbers not in A036990. %H A125086 Reinhard Zumkeller, <a href="/A125086/b125086.txt">Table of n, a(n) for n = 1..10000</a> %H A125086 <a href="/index/Bi#binary">Index entries for sequences related to binary expansion of n</a> %o A125086 (Haskell) %o A125086 a125086 n = a125086_list !! (n-1) %o A125086 a125086_list = f [0, 2 ..] a036990_list where %o A125086 f (u:us) vs'@(v:vs) = if u == v then f us vs else u : f us vs' %o A125086 -- _Reinhard Zumkeller_, Aug 01 2013 %K A125086 nonn %O A125086 1,1 %A A125086 _Robert G. Wilson v_, Jan 25 2007