login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A319230 Triple prime Fibonacci numbers: Fibonacci numbers f such that (1) f is prime, (2) f's index is prime, and (3) the sum of f's digits is prime. 1
2, 5, 89, 514229, 433494437, 2971215073, 3061719992484545030554313848083717208111285432353738497131674799321571238149015933442805665949 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
a(8) = A000045(104911) has 21925 decimal digits. - Alois P. Heinz, Sep 17 2018
LINKS
FORMULA
a(n) = A000045(A319393(n)).
EXAMPLE
514229 is prime; it is the 29th Fibonacci number and 29 is prime; and the sum of its digits is 23 and 23 is prime.
MATHEMATICA
Select[With[{nn=2000}, Pick[Fibonacci[Range[nn]], PrimeQ[Range[nn]]]], PrimeQ[#] && PrimeQ[ Total[ IntegerDigits[#]]]&]
CROSSREFS
Sequence in context: A023272 A057978 A093308 * A215797 A262325 A290871
KEYWORD
nonn,base
AUTHOR
Harvey P. Dale, Sep 14 2018
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 28 14:38 EDT 2024. Contains 371254 sequences. (Running on oeis4.)