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A088184 Numbers that can be written as sum of two coprime semiprimes. 2

%I

%S 13,19,23,25,29,31,34,35,37,39,41,43,44,46,47,49,51,53,55,57,58,59,61,

%T 63,64,65,67,68,69,71,73,74,75,76,77,79,81,82,83,85,86,87,88,89,91,92,

%U 93,94,95,97,98,99,100,101,102,103,104,106,107,109,111,112,113,114

%N Numbers that can be written as sum of two coprime semiprimes.

%C A088183(a(n))>0; complement of A088185.

%e 25 = 2*2+3*7, therefore 25 is a term;

%e 2*2+2*11 is the only partition of n=26 into two semiprimes,

%e gcd(2*2,2*11)=2>1, therefore 26 is not a term.

%Y Cf. A001358.

%K nonn

%O 1,1

%A _Reinhard Zumkeller_, Sep 22 2003

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Last modified July 30 17:21 EDT 2021. Contains 346359 sequences. (Running on oeis4.)