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A093307 k-th upper twin prime, where k is the n-th Fibonacci number. 0
5, 5, 7, 13, 31, 73, 181, 349, 859, 1723, 3361, 6091, 11833, 22273, 41959, 77713, 138403, 249439, 447793, 799741, 1399201, 2459923, 4312741, 7581943, 13233841, 23019043, 39921979, 69112963, 119168383, 205190353, 352286899, 603678289, 1032646423, 1763797501 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..34.

FORMULA

a(n) = 2 + A093306(n) = A006512(A000045(n)). - R. J. Mathar, Feb 06 2010

PROG

(PARI) g(n) = for(x=1, n, print1(twinu(fibonacci(x))", ")) twinu(n) = { local(c, x); c=0; x=1; while(c<n, if(isprime(prime(x)+2), c++); x++; ); return(prime(x)) }

(PARI) default(primelimit, 20000000); twinu(n) = { local(c, x); c=0; x=1; while(c<n, if(isprime(prime(x)+2), c++); x++); return(prime(x)) } { for(n=1, 25, write("b093307.txt", n, " ", twinu(fibonacci(n)))); } \\ Harry J. Smith, Jun 20 2009

CROSSREFS

Cf. A000045, A006512, A093306.

Sequence in context: A247877 A252006 A158299 * A264388 A141392 A088047

Adjacent sequences:  A093304 A093305 A093306 * A093308 A093309 A093310

KEYWORD

nonn

AUTHOR

Cino Hilliard, Apr 25 2004

EXTENSIONS

a(24)-a(25) from Harry J. Smith, Jun 20 2009

a(26)-a(34) from Giovanni Resta, Jun 10 2018

STATUS

approved

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Last modified October 16 05:23 EDT 2019. Contains 328043 sequences. (Running on oeis4.)