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A082496 Numbers of the form 2p+1, where p and p+2 are a pair of twin primes. 1

%I #12 Jun 24 2014 01:08:35

%S 7,11,23,35,59,83,119,143,203,215,275,299,359,383,395,455,479,539,563,

%T 623,695,839,863,923,1043,1139,1199,1235,1283,1319,1619,1643,1655,

%U 1715,1763,2039,2063,2099,2123,2183,2303,2459,2555,2579,2603,2639,2855,2903

%N Numbers of the form 2p+1, where p and p+2 are a pair of twin primes.

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/TwinPrimes.html">Twin Primes</a>

%F a(n) = 2*A001359(n) + 1 = 2*A006512(n) - 3 = A001359(n) + A006512(n) - 1

%t 2Select[ Prime/@Range[ 250 ], PrimeQ[ #+2 ]& ]+1

%Y Cf. A001359, A006512.

%Y Equals A054735 - 1.

%K nonn

%O 1,1

%A Vincenzo Origlio (vincenzo.origlio(AT)itc.cnr.it), Apr 29 2003

%E Edited by _Dean Hickerson_, Jun 20 2003

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Last modified April 16 16:35 EDT 2024. Contains 371749 sequences. (Running on oeis4.)