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Search: id:A075737
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| A075737 |
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Prime Fibonacci numbers with prime indices. |
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+0
20
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| 2, 5, 13, 89, 233, 1597, 28657, 514229, 433494437, 2971215073, 99194853094755497, 1066340417491710595814572169, 19134702400093278081449423917
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Same as A005478 except that F(4) = 3 has been omitted.
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EXAMPLE
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5 is a prime and fibonacci(5)=5 is also a prime, 7 is a prime and fibonacci(7)=13 is also a prime, but 2 is a prime and fibonacci(2)=1 is not a prime.
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MAPLE
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with(combinat, fibonacci): fib_supM_pra := proc(n); if (isprime(n)='true') then if (isprime(fibonacci(n))='true') then RETURN(fibonacci(n)); fi; fi; end: seq(fib_supM_pra(i), i=1..500);
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MATHEMATICA
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Fibonacci[ Prime[ Select[ Range[50], PrimeQ[ Fibonacci[ Prime[ # ]]] & ]]]
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CROSSREFS
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Cf. A000045, A005478, A030426, A083668.
Sequence in context: A075736 A030426 A075742 this_sequence A100843 A082101 A158712
Adjacent sequences: A075734 A075735 A075736 this_sequence A075738 A075739 A075740
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KEYWORD
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easy,nonn
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AUTHOR
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Jani Melik (jani_melik(AT)hotmail.com), Oct 07 2002
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