login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A115347 Fibonacci primes that are also primes when their digits are reversed. 2
2, 3, 5, 13, 1597 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

There are no other numbers that qualify through the 10000th Fibonacci number (which has 2,090 digits).

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

13 is the 7th Fibonacci number. It is prime and its reversal, 31, is also prime.

MATHEMATICA

Select[Fibonacci[Range[10000]], PrimeQ[ # ]&&PrimeQ[FromDigits[Reverse[IntegerDigits[ # ]]]]&]

CROSSREFS

Cf. A000045.

Sequence in context: A041639 A006985 A042907 * A173654 A126333 A266192

Adjacent sequences:  A115344 A115345 A115346 * A115348 A115349 A115350

KEYWORD

nonn,base

AUTHOR

Harvey P. Dale, Mar 07 2006

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 20 22:20 EDT 2019. Contains 325189 sequences. (Running on oeis4.)