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Sums of 2 distinct primorials.
4

%I #2 Mar 30 2012 18:40:52

%S 3,7,8,31,32,36,211,212,216,240,2311,2312,2316,2340,30031,30032,30036,

%T 30060,30240,32340,510511,510512,510516,510540,510720,512820,540540,

%U 9699691,9699692,9699696,9699720,9699900,9702000,9729720,10210200

%N Sums of 2 distinct primorials.

%C This is to numbers that are the sum of 2 different primes (A038609) as primorials (A002110) are to primes (A000040). The subsequence of primes among these sums of 2 distinct primorials is the sequence of primorial primes (A018239) which is the same as the subsequence of primes among the Euclid numbers (A006862).

%F {a(n)} = {A002110(i) + A002110(j) for i =/= j}.

%Y Cf. A000040, A002110, A006862, A038609.

%K easy,nonn

%O 1,1

%A _Jonathan Vos Post_, May 11 2010