%I #3 Mar 30 2012 17:26:16
%S 4,9,10,21,22,39,34,57,46,87,62,111,82,129,94,159,118,183,134,213,146,
%T 237,166,267,194,303,206,321,218,339,254,393,274,417,298,453,314,489,
%U 334,519,358,543,382,579,394,597,422,669,454,687
%N Primes multiplied alternately by 2 and 3.
%C Cf. A107620 Primes multiplied alternately by 3 and 2.
%F A107621(n) = prime(n)*(3 - mod(n, 2)).
%t A107621[n_]:= Prime[n] (3 - Mod[n, 2])
%Y Cf. A107620.
%K easy,nonn
%O 1,1
%A _Zak Seidov_, May 18 2005
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