OFFSET
1,7
COMMENTS
a(n) is the number of zeros at rightmost place of F(n)!
REFERENCES
C. Suriano, Miniature Matematiche, Il rosone, 2009, pp. 149-152.
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
EXAMPLE
F(7)!=13!=6227020800 which ends with 2 zeros; therefore a(7)=2.
MATHEMATICA
zOF[n_Integer?Positive]:=Module[{maxpow=0}, While[5^maxpow<=n, maxpow++]; Plus@@Table[Quotient[n, 5^i], {i, maxpow-1}]]; zOF[#]&/@ Fibonacci[ Range[ 50]] (* Harvey P. Dale, Jan 10 2020 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Carmine Suriano, Sep 26 2009
EXTENSIONS
Extended and edited by Charles R Greathouse IV, Mar 23 2010
STATUS
approved