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 A085857 #9 Dec 15 2017 17:36:30
%S A085857 0,0,0,0,1,0,0,1,0,1,0,0,0,2,1,0,0,0,0,0,0,0,0,0,1,0,2,0,1,0,1,1,1,1,
%T A085857 0,0,2,0,1,1,2,0,0,3,2,2,3,1,0,0,0,1,1,3,0,2,2,2,0,0,0,1,2,1,1,0,1,1,
%U A085857 1,1,2,1,0,4,1,0,1,1,3,2,2,4,1,1,2,0,1,2,2,0,1,3,2,1,1,3,2,2,3,1,1,2,2,2,3
%N A085857 Number of 3's in decimal expansion of Fibonacci(n).
%t A085857 Table[DigitCount[Fibonacci[n]][[3]], {n, 0, 200}] (* _Vladimir Joseph Stephan Orlovsky_, Jul 01 2011 *)
%Y A085857 Cf. 0's A085854, 1's A085855, 2's A085856, 4's A085858, 5's A085859, 6's A085860, 7's A085861, 8's A085862, 9's A085863.
%K A085857 base,nonn
%O A085857 0,14
%A A085857 _Jason Earls_, Jul 06 2003