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A119984 Numbers n such that Fibonacci(prime(n)) is prime. 5
2, 3, 4, 5, 6, 7, 9, 10, 14, 15, 23, 32, 33, 72, 83, 84, 87, 97, 104, 105, 429, 637, 710, 1152, 1194, 1692, 2814, 3316, 3824, 3971, 5206, 8002, 10016, 12161, 13681, 18069, 33653, 36467, 48355, 48629, 49455, 73574, 82128, 99005, 123685, 135276, 146779, 210404, 233207, 239581 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

All prime Fibonacci numbers have prime indices, except prime F(4) = 3, a(n) is such that Fibonacci(Prime(a(n))) is prime. - Robert G. Wilson v, Aug 05 2006

LINKS

Table of n, a(n) for n=1..50.

FORMULA

a(n) = pi(A001605(n+1)). This holds for all n including n=1, since pi(4) = pi(3) = 2. - Jens Kruse Andersen, Jul 24 2014

MATHEMATICA

Select[ Range@3000, PrimeQ@ Fibonacci@ Prime@ # &] (* Robert G. Wilson v, Aug 05 2006 *)

CROSSREFS

Cf. A075737, A005478, A001605, A030426, A083668.

Sequence in context: A152493 A229028 A079002 * A059879 A132430 A049537

Adjacent sequences:  A119981 A119982 A119983 * A119985 A119986 A119987

KEYWORD

nonn

AUTHOR

Alexander Adamchuk, Aug 04 2006

EXTENSIONS

a(21)-a(27) from Robert G. Wilson v, Aug 05 2006

More terms (from A001605) from T. D. Noe, Aug 18 2006

a(42)-a(48) (from A001605, found by Henri Lifchitz) from Jens Kruse Andersen, Jul 24 2014

a(49)-a(50) (from A001605, found by Henri Lifchitz) from Amiram Eldar, Sep 01 2019

STATUS

approved

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Last modified August 14 01:48 EDT 2020. Contains 336474 sequences. (Running on oeis4.)