A085863 Number of 9's in decimal expansion of Fibonacci(n).

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 2, 1, 0, 0, 2, 1, 0, 1, 1, 1, 1, 1, 1, 0, 3, 1, 0, 1, 0, 1, 3, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 3, 4, 1, 2, 2, 3, 1, 1, 2, 3, 0, 0, 2, 2, 5, 0, 4, 2, 2, 1, 4, 1, 1, 1, 0, 2, 6, 0, 2, 1, 4, 2, 0, 6, 1, 4

Offset

0,39

Links

David A. Corneth, Table of n, a(n) for n = 0..10000

Example

a(11) = 1 as Fibonacci(11) = 89 contains exactly one (1) decimal digit 9. - David A. Corneth, Sep 01 2025

Mathematica

DigitCount[#, 10, 9]&/@Fibonacci[Range[0, 110]] (* Harvey P. Dale, Jan 10 2017 *)

Crossrefs

Cf. A000045.

Cf. 0's A085854, 1's A085855, 2's A085856, 3's A085857, 4's A085858, 5's A085859, 6's A085860, 7's A085861, 8's A085862.

Sequence in context: A123721 A077618 A356859 * A220354 A344478 A335489

Adjacent sequences: A085860 A085861 A085862 * A085864 A085865 A085866

Keyword

nonn,easy,base

Author

Jason Earls, Jul 06 2003

Status

approved