OFFSET
1,2
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..200
EXAMPLE
a(3)=22 since 22nd Fibonacci number i.e. 17711 contains exactly 3, 1's.
MATHEMATICA
Module[{nn=2000, fi}, fi=Table[{n, DigitCount[Fibonacci[n], 10, 1]}, {n, nn}]; Table[ SelectFirst[fi, #[[2]]==k&], {k, 50}]][[All, 1]] (* Harvey P. Dale, Sep 25 2019 *)
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Shyam Sunder Gupta, Jul 14 2002
EXTENSIONS
a(20)-a(49) from Alois P. Heinz, Apr 26 2017
STATUS
approved