

A177247


Fibonacci numbers Fib(n) whose decimal expansion does not contain any digit 6.


3



1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 987, 1597, 2584, 4181, 17711, 75025, 121393, 317811, 514229, 832040, 2178309, 3524578, 5702887, 14930352, 24157817, 102334155, 433494437, 701408733, 1134903170, 2971215073, 7778742049
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OFFSET

1,3


COMMENTS

Probability that Fib(n) contains no 6's goes to zero as n grows to infinity. I suppose the maximum number is F(258) having 54 digits with no 6's.


LINKS

Table of n, a(n) for n=1..35.


EXAMPLE

a(7)=13 since it is the 7th Fibonacci having no 6's


CROSSREFS

Cf. A000045, A177194, A177195, A177231, A177245, A177246, A176253
Sequence in context: A132916 A274163 A177194 * A069041 A177372 A109609
Adjacent sequences: A177244 A177245 A177246 * A177248 A177249 A177250


KEYWORD

nonn,base


AUTHOR

Carmine Suriano, May 06 2010


STATUS

approved



