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 A030413 #12 Feb 14 2014 01:34:04 %S A030413 1,2,3,1,1,2,0,3,1,1,1,1,2,0,2,3,1,3,1,1,2,1,2,1,0,0,3,2,2,1,1,1,3,2, %T A030413 1,2,1,2,0,2,3,3,1,2,3,1,2,0,3,3,1,2,2,0,1,2,0,1,0,0,1,1,1,1,1,2,2,1, %U A030413 2,3,1,2,2,2,3,0,0,2,1,0,1,1,0,2,3,3,1,2,3,3 %N A030413 Write (n+1)st Fibonacci number in base 4 and juxtapose. %t A030413 Rest[Flatten[IntegerDigits[#,4]&/@Fibonacci[Range[30]]]] (* _Harvey P. Dale_, Jun 06 2011 *) %K A030413 nonn %O A030413 1,2 %A A030413 _Clark Kimberling_