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Search: id:A078743
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| A078743 |
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a(n) is the Fibonacci index of b(n) in the sequence b(1), b(2), ... where b(n) is the smallest Fibonacci number > b(n-1) such that b(1) + ... + b(n) is prime. |
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+0
2
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OFFSET
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1,1
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COMMENT
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A more compact version of A078742. a(7), if it exists, >10^15
A more compact version of A078742. a(7), if it exists, > 73, because A078742(7), if it exists, >10^15. - N. Fernandez (primeness(AT)borve.org), Aug 22 2007
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EXAMPLE
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The smallest Fibonacci number to be prime is 2, the 3rd Fibonacci number, so a(1)=3. The smallest Fibonacci number >2 that yields a prime when added to 2 is 3, the 4th Fibonacci number, so a(2)=4. The smallest Fibonacci number >3 that yields a prime when added to 2+3 is 8, the 4th Fibonacci number, so a(3)=6.
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CROSSREFS
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Cf. A000045, A078742.
Sequence in context: A010430 A097922 A103109 this_sequence A096846 A140570 A032720
Adjacent sequences: A078740 A078741 A078742 this_sequence A078744 A078745 A078746
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KEYWORD
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nonn
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AUTHOR
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N. Fernandez (primeness(AT)borve.org), Dec 21 2002
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