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Semiprimes in Gica-Panaitopol recursion A193298.
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%I #12 Mar 30 2012 18:40:59

%S 4,6,9,10,14,15,21,22,25,26,33,34,35,38,39,46,49,51,55,57,58,69,74,77,

%T 82,85,86,87,91,106,111,115,118,119,121,122,123,129,133,134,158,159,

%U 161,166,169,177,178,183,185,187,194,201,202,203,205,206,237,247

%N Semiprimes in Gica-Panaitopol recursion A193298.

%C Gica-Panaitopol semiprimes. Numbers of the form p*q where p and q are primes, not necessarily distinct, in Gica-Panaitopol recursion: g(1) = 1; g(n+1) = 2*g(n) if g(n) <= n; otherwise g(n+1) = g(n) - 1.

%F A001358 INTERSECTION A193298.

%Y Cf. A001358, A193298, A193299.

%K nonn,easy

%O 1,1

%A _Jonathan Vos Post_, Aug 05 2011