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A072316
Smallest Fibonacci number containing exactly n 7's.
0
987, 377, 86267571272, 7778742049, 10284720757613717413913, 781774079430987230203437, 1725375039079340637797070384, 17978720198565577104981084195586024127087428957
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
Sequence in context: A163025 A069299 A248352 * A222351 A221696 A221128
KEYWORD
base,nonn
AUTHOR
Shyam Sunder Gupta, Jul 14 2002
STATUS
approved