A085860 Number of 6's in decimal expansion of Fibonacci(n).

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 2, 1, 0, 1, 2, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 1, 0, 0, 1, 2, 0, 1, 2, 0, 0, 0, 1, 0, 2, 0, 2, 1, 0, 1, 2, 1, 0, 3, 1, 2, 0, 1, 0, 1, 1, 3, 0, 0, 1, 3, 0, 1, 1, 1, 2, 0, 3, 0, 1, 2, 3, 2, 2, 0, 4, 2, 2, 4, 2, 1, 2, 4, 2, 2, 2, 1, 1, 1, 2, 2, 1, 0, 2, 3, 0

Offset

0,21

Links

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

Example

From David A. Corneth, Sep 09 2025: (Start)
a(1) = 0 as Fibonacci(1) = 1 which has 0 digits 6.
a(15) = 1 as Fibonacci(15) = 610 which has 1 digit 6.
a(20) = 2 as Fibonacci(20) = 6765 which has 2 digits 6. (End)

Mathematica

DigitCount[Fibonacci[Range[0, 110]], 10, 6] (* Harvey P. Dale, Jun 19 2013 *)

Crossrefs

Cf. A000045.

Cf. 0's A085854, 1's A085855, 2's A085856, 3's A085857, 4's A085858, 5's A085859, 7's A085861, 8's A085862, 9's A085863.

Sequence in context: A168120 A355682 A063933 * A178665 A170958 A178651

Adjacent sequences: A085857 A085858 A085859 * A085861 A085862 A085863

Keyword

nonn,easy

Author

Jason Earls, Jul 06 2003

Status

approved