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 A085858 #8 Dec 15 2017 17:36:30 %S A085858 0,0,0,0,0,0,0,0,0,1,0,0,2,0,0,0,0,0,1,1,0,1,0,0,1,0,0,1,0,1,1,1,0,1, %T A085858 0,1,1,1,0,1,1,1,1,4,1,1,0,0,1,2,0,1,0,0,0,2,1,1,0,1,1,1,1,2,0,0,0,3, %U A085858 3,2,1,0,4,1,3,1,3,1,5,4,3,1,0,3,1,1,3,0,0,3,1,2,5,1,2,4,1,4,4,1,3,4,0,0,2 %N A085858 Number of 4's in decimal expansion of Fibonacci(n). %t A085858 DigitCount[Fibonacci[Range[0,110]],10,4] (* _Harvey P. Dale_, May 02 2011 *) %Y A085858 Cf. 0's A085854, 1's A085855, 2's A085856, 3's A085857, 5's A085859, 6's A085860, 7's A085861, 8's A085862, 9's A085863. %K A085858 base,nonn %O A085858 0,13 %A A085858 _Jason Earls_, Jul 06 2003