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A105514 Number of times 4 is the leading digit of the first n+1 Fibonacci numbers in decimal representation. 9

%I

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

%T 2,2,2,2,2,2,2,2,2,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,4,4,4,4,5,5,5,5,5,6,

%U 6,6,6,6,7,7,7,7,7,7,7,7,7,7,7,7,7,7,8,8,8,8,8,9,9,9,9,9,9,9,9,9,9,9,9,9,9

%N Number of times 4 is the leading digit of the first n+1 Fibonacci numbers in decimal representation.

%C a(n) = #{k: A008963(k) = 4 and 0<=k<=n};

%C a(A105504(n)) = a(A105504(n) - 1) + 1;

%C n = A105511(n) + A105512(n) + A105513(n) + a(n) + A105515(n) + A105516(n) + A105517(n) + A105518(n) + A105519(n).

%Y Cf. A000030, A000045.

%K nonn,base

%O 0,25

%A _Reinhard Zumkeller_, Apr 11 2005

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Last modified April 18 07:59 EDT 2021. Contains 343084 sequences. (Running on oeis4.)