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 A092728 Primes prime(k) such that prime(k)*prime(k+1)-4 is a prime. 1
 2, 3, 5, 7, 11, 19, 41, 43, 71, 79, 89, 101, 113, 127, 139, 197, 229, 359, 397, 431, 463, 499, 683, 709, 773, 857, 881, 967, 1009, 1031, 1109, 1151, 1213, 1279, 1297, 1373, 1423, 1427, 1447, 1451, 1559, 1597, 1607, 1699, 1783, 1787, 1823, 1951, 1993, 2081 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Robert Israel, Table of n, a(n) for n = 1..10000 MAPLE Primes:= [seq(ithprime(i), i=1..1000)]: Primes[select(t -> isprime(Primes[t]*Primes[t+1]-4), [\$1..999])]; # Robert Israel, Jan 10 2019 MATHEMATICA Transpose[Select[Partition[Prime[Range[500]], 2, 1], PrimeQ[Times@@#- 4]&]] [[1]] (* Harvey P. Dale, Jan 22 2012 *) CROSSREFS Sequence in context: A215161 A227907 A118985 * A089769 A033274 A071062 Adjacent sequences:  A092725 A092726 A092727 * A092729 A092730 A092731 KEYWORD nonn AUTHOR Giovanni Teofilatto, Apr 12 2004 EXTENSIONS Corrected and extended by Harvey P. Dale, Jan 22 2012 Name edited by Robert Israel, Jan 10 2019 STATUS approved

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Last modified April 18 14:46 EDT 2019. Contains 322209 sequences. (Running on oeis4.)