

A123677


Primes p such that Lucas(prime(p)) is prime, where Lucas = A000032.


3



3, 5, 7, 11, 13, 71, 113, 643, 769, 13681, 51929
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OFFSET

1,1


COMMENTS

These are the primes in A120561.
Numbers n such that Lucas(prime(n)) is prime are listed in A120561; indices of prime Lucas numbers are listed in A001606.


LINKS

Table of n, a(n) for n=1..11.


FORMULA

a(n) = prime(A123678(n)).
a(n) = pi(A277290(n)).  Bobby Jacobs, Oct 30 2016


CROSSREFS

Cf. A000032, A123678, A120561, A001606, A119984, A122534, A277290.
Sequence in context: A288370 A108817 A288892 * A133954 A087325 A072151
Adjacent sequences: A123674 A123675 A123676 * A123678 A123679 A123680


KEYWORD

hard,more,nonn


AUTHOR

Alexander Adamchuk, Oct 05 2006


EXTENSIONS

51929 found by Henri Lifchitz, from Jens Kruse Andersen, Jul 24 2014


STATUS

approved



