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A117740 Prime Fibonacci numbers that are Chen primes. 0

%I #4 Sep 03 2017 11:25:21

%S 2,3,5,13,89,233,514229

%N Prime Fibonacci numbers that are Chen primes.

%p ischenprime:=proc(n); if (isprime(n) = 'true') then if (isprime(n+2) = 'true' or numtheory[bigomega](n+2) = 2) then RETURN('true') else RETURN('false') fi fi end: ts_prime_fibonacci_chen:=proc(n) local i, tren, ans; ans:= [ ]: for i from 0 to n do tren := combinat[fibonacci](i): if (isprime( tren ) = 'true' and ischenprime(tren) = 'true') then ans:=[op(ans), tren]: fi od; RETURN(ans) end: ts_prime_fibonacci_chen(300); # _Jani Melik_, May 05 2006

%Y Cf. A005478, A109611.

%K nonn

%O 1,1

%A _Jani Melik_, Apr 28 2006; corrected Apr 28 2006

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Last modified April 19 12:14 EDT 2024. Contains 371792 sequences. (Running on oeis4.)