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 A020913 #8 Apr 25 2016 14:24:28 %S A020913 1,1,1,1,2,2,2,2,3,3,3,4,4,4,4,5,5,5,6,6,6,7,7,7,7,8,8,8,9,9,9,10,10, %T A020913 10,10,11,11,11,12,12,12,13,13,13,13,14,14,14,15,15,15,16,16,16,16,17, %U A020913 17,17,18,18,18,19,19,19,19,20,20,20,21,21,21,22,22,22,22,23,23,23,24,24 %N A020913 Number of terms in base 5 representation of Fibonacci(n). %p A020913 A020913 := proc(n) %p A020913 convert(combinat[fibonacci](n),base,5) ; %p A020913 nops(%) ; %p A020913 end proc: # _R. J. Mathar_, Apr 16 2013 %t A020913 IntegerLength[Fibonacci[Range[80]],5] (* _Harvey P. Dale_, Apr 25 2016 *) %K A020913 nonn %O A020913 1,5 %A A020913 _Clark Kimberling_