A117745 Prime Fibonacci numbers that are not Chen primes.

1597, 28657, 433494437, 2971215073, 99194853094755497, 1066340417491710595814572169, 19134702400093278081449423917

Offset

0,1

Links

Table of n, a(n) for n=0..6.

Maple

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_notchen:=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) = 'false') then ans:=[op(ans), tren]: fi od; return ans end: ts_prime_fibonacci_notchen(300); # Jani Melik, May 05 2006

Crossrefs

Cf. A005478, A109611.

Sequence in context: A068131 A068263 A078954 * A340532 A189456 A084427

Adjacent sequences: A117742 A117743 A117744 * A117746 A117747 A117748

Keyword

nonn

Author

Jani Melik, Apr 28 2006

Status

approved