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A105444
a(n) = the smallest prime p such that p+6 and q+6 are prime; q is the n-th prime after p.
3
5, 5, 5, 5, 7, 5, 7, 5, 5, 5, 7, 5, 5, 7, 5, 5, 7, 5, 7, 5, 7, 5, 5, 5, 5, 13, 11, 7, 5, 13, 11, 7, 5, 5, 7, 5, 5, 11, 7, 5, 5, 13, 11, 7, 5, 5, 7, 5, 11, 7, 5, 5, 5, 7, 5, 5, 13, 11, 7, 5, 5, 11, 7, 5, 7, 5, 7, 5, 7, 5, 5, 7, 5, 37, 23, 37, 17, 13, 11, 7, 5, 7, 5, 7, 5, 5, 23, 37, 17, 13, 11, 7
OFFSET
1,1
EXAMPLE
a(2)=5 because 5+6 and 11+6 are primes.
CROSSREFS
KEYWORD
nonn
AUTHOR
Cino Hilliard, May 02 2005
EXTENSIONS
Edited by Don Reble, Jun 11 2007
STATUS
approved