OFFSET
1,1
EXAMPLE
a(2)=144 so 144 is the smallest Fibonacci number containing exactly two 4's.
MATHEMATICA
With[{f=Fibonacci[Range[1000]]}, Table[Select[f, DigitCount[#, 10, 4]==n&, 1], {n, 9}]]//Flatten (* Harvey P. Dale, May 24 2017 *)
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Shyam Sunder Gupta, Jul 14 2002
EXTENSIONS
a(9) from Harvey P. Dale, May 24 2017
STATUS
approved