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A096478 a(n) = A000040(A096477(n)), i.e., prime(a(n)) and prime(1 + a(n)) are twin primes. 4

%I #15 Jul 27 2017 04:18:51

%S 2,3,5,7,13,17,41,43,83,89,109,113,173,277,307,313,353,373,463,563,

%T 577,601,613,643,673,719,743,1117,1123,1171,1279,1571,1621,1627,1709,

%U 1741,1823,1867,1907,1949,1979,1987,1999,2003,2063,2099,2153,2287,2309,2311

%N a(n) = A000040(A096477(n)), i.e., prime(a(n)) and prime(1 + a(n)) are twin primes.

%C Gives primes in A029707. - _Pierre CAMI_, Apr 20 2006

%H Vincenzo Librandi, <a href="/A096478/b096478.txt">Table of n, a(n) for n = 1..1000</a>

%e n=10: a(10) = 89 means that prime(1 + 89) - prime(89) = 463 - 461 = 2; prime with subscript 89 (which is prime) and the next prime (i.e., prime(90)) are twin primes.

%t Prime[Flatten[Position[Table[Prime[Prime[n]+1]-Prime[Prime[n]], {n, 1, 1000}], 2]]]

%Y Cf. A006450, A072677, A073124, A096477.

%Y Cf. A029707, A000720.

%K nonn

%O 1,1

%A _Labos Elemer_, Jun 23 2004

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)