A020913 - OEIS

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A020913

Number of terms in base 5 representation of Fibonacci(n).

1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 15, 15, 15, 16, 16, 16, 16, 17, 17, 17, 18, 18, 18, 19, 19, 19, 19, 20, 20, 20, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 24, 24

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OFFSET

1,5

LINKS

Table of n, a(n) for n=1..80.

MAPLE

A020913 := proc(n)

convert(combinat[fibonacci](n), base, 5) ;

nops(%) ;

end proc: # R. J. Mathar, Apr 16 2013

MATHEMATICA

IntegerLength[Fibonacci[Range[80]], 5] (* Harvey P. Dale, Apr 25 2016 *)