%I #9 Dec 15 2017 17:36:29

%S 0,1,1,0,0,0,0,1,1,0,0,0,1,0,0,1,0,1,0,2,0,1,3,0,0,0,2,2,3,1,0,1,1,0,

%T 0,0,1,2,1,0,2,3,1,0,1,3,3,2,0,0,1,2,1,3,1,1,2,1,1,1,1,2,1,1,2,3,0,1,

%U 2,2,2,4,2,1,1,3,1,0,1,2,1,1,5,1,2,3,2,2,5,4,3,1,2,5,3,1,1,2,2,2,3,5,2,1,0

%N Number of 1's in decimal expansion of Fibonacci(n).

%e Fibonacci(10)=55, so a(10)=0 and Fibonacci(21)=10946, so a(21)=1.

%t Table[DigitCount[Fibonacci[n]][[1]], {n, 0, 200}] (* _Vladimir Joseph Stephan Orlovsky_, Jul 01 2011 *)

%Y Cf. 0's A085854, 2's A085856, 3's A085857, 4's A085858, 5's A085859, 6's A085860, 7's A085861, 8's A085862, 9's A085863.

%K base,nonn

%O 0,20

%A _Jason Earls_, Jul 06 2003