OFFSET
1,1
EXAMPLE
a(2)=377 so 377 is the smallest Fibonacci number containing exactly two 7's.
MATHEMATICA
With[{f={#, DigitCount[#, 10, 7]}&/@Fibonacci[Range[400]]}, Table[ SelectFirst[ f, #[[2]] == n&], {n, 10}]][[All, 1]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Sep 20 2019 *)
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Shyam Sunder Gupta, Jul 14 2002
STATUS
approved