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A049490 a(n) and a(n)+64 both prime. 4

%I

%S 3,7,19,37,43,67,73,103,109,127,163,193,199,229,283,337,367,379,397,

%T 439,457,499,523,577,613,619,709,733,757,823,877,883,907,919,967,997,

%U 1033,1039,1087,1117,1123,1129,1153,1213,1237,1297,1303,1423,1429,1447

%N a(n) and a(n)+64 both prime.

%H Zak Seidov, <a href="/A049490/b049490.txt">Table of n, a(n) for n = 1..1000</a>

%e 19 and 19+64=83 both prime.

%t Select[Prime[Range[300]],PrimeQ[#+64]&] (* _Harvey P. Dale_, Mar 21 2011 *)

%o (PARI) select(p -> isprime(p+64),primes(1000)) \\ _Edward Jiang_, Sep 05 2014

%Y Cf. A001359, A023200, A023202.

%K nonn

%O 1,1

%A _Labos Elemer_

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Last modified August 4 03:18 EDT 2021. Contains 346442 sequences. (Running on oeis4.)