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Search: id:A093306
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| A093306 |
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k-th lower twin prime, where k is the n-th Fibonacci number. |
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+0
1
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| 3, 3, 5, 11, 29, 71, 179, 347, 857, 1721, 3359, 6089, 11831, 22271, 41957, 77711, 138401, 249437, 447791, 799739, 1399199, 2459921, 4312739, 7581941, 13233839
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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For n=6, the 6th Fibonacci number is 8 and the 8th lower twin prime is 71, the 6th entry.
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PROGRAM
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(PARI) f(n) = for(x=1, n, print1(twinl(fibonacci(x))", ")) twinl(n) = { local(c, x); c=0; x=1; while(c<n, if(isprime(prime(x)+2), c++); x++; ); return(prime(x-1)) }
(PARI) default(primelimit, 20000000); twinl(n) = { local(c, x); c=0; x=1; while(c<n, if(isprime(prime(x)+2), c++); x++); return(prime(x-1)) } { for(n=1, 25, write("b093306.txt", n, " ", twinl(fibonacci(n)))); } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jun 20 2009]
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CROSSREFS
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Sequence in context: A084656 A073749 A146918 this_sequence A093309 A126318 A142701
Adjacent sequences: A093303 A093304 A093305 this_sequence A093307 A093308 A093309
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KEYWORD
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nonn
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AUTHOR
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Cino Hilliard (hillcino368(AT)gmail.com), Apr 25 2004
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EXTENSIONS
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Added more terms. Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jun 20 2009
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