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%I #7 Feb 25 2018 22:55:15
%S 0,0,0,1,1,1,1,2,2,2,2,2,3,3,3,3,3,4,4,4,4,5,5,5,5,5,6,6,6,6,6,7,7,7,
%T 7,8,8,8,8,8,9,9,9,9,10,10,10,10,10,11,11,11,11,11,12,12,12,12,13,13,
%U 13,13,13,14,14,14,14,14,15,15,15,15,16,16,16,16,16,17,17,17,17,17,18,18
%N Number of blocks of exactly 4 Fibonacci numbers having equal length <= n.
%C Lim_{n->infinity} a(n)/n = 5 - 1/log_10((1+sqrt(5))/2) = 0.215....
%C a(n) = Sum_{k=1..n} A105563(k); a(n) = n - A105566(n).
%D Juergen Spilker, Die Ziffern der Fibonacci-Zahlen, Elemente der Mathematik 58 (Birkhäuser 2003).
%K nonn
%O 1,8
%A _Reinhard Zumkeller_, Apr 14 2005
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