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A105048 Numbers n such that prime(n+2) - ( prime(n+1)-prime(n) ) is a semiprime. 0

%I #7 Jun 03 2013 13:16:25

%S 1,3,4,5,6,7,8,9,10,11,12,14,16,17,18,19,20,21,22,23,24,28,29,31,32,

%T 34,35,37,38,42,45,47,50,51,52,53,56,60,63,65,66,67,68,70,71,72,74,76,

%U 77,79,80,83,84,85,86,87,95,96,97,99,100,101,103,105,106,111,113,114,115

%N Numbers n such that prime(n+2) - ( prime(n+1)-prime(n) ) is a semiprime.

%o (PARI) isok(n) = bigomega(prime(n+2) - (prime(n+1)-prime(n))) == 2 \\ _Michel Marcus_, Jun 03 2013

%Y Cf. A104243.

%K easy,nonn

%O 1,2

%A _Giovanni Teofilatto_, Apr 04 2005

%E More terms from _Rick L. Shepherd_, May 18 2005

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Last modified April 23 18:16 EDT 2024. Contains 371916 sequences. (Running on oeis4.)