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Numbers n such that sum of n-th and (n+1)-th semiprimes is a semiprime.
5

%I #5 Mar 12 2015 19:02:27

%S 1,2,9,12,14,15,16,18,20,23,24,26,30,32,34,35,36,38,43,44,49,50,54,55,

%T 56,57,58,61,62,63,66,67,68,69,73,75,80,84,88,91,93,98,99,100,103,107,

%U 108,110,112,114,118,119,124,125,128,133,137,138,146,147,150,151,153

%N Numbers n such that sum of n-th and (n+1)-th semiprimes is a semiprime.

%e 9 is a member because sum of 9th and 10th semiprimes, 25 and 26, is 51 which is a semiprime.

%Y Resulting semiprimes: A092192.

%K easy,nonn

%O 1,2

%A _Zak Seidov_, Feb 23 2004