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Recursively adding to a sum beginning with 1 the product of the smallest k primes not dividing the predecessor yields a prime for these values of k.
1

%I #25 Feb 08 2013 23:40:51

%S 1,2,3,6,8,10,11,18,20,32,50,110,153,507,727,900,982,1489,1737,1974,

%T 3085

%N Recursively adding to a sum beginning with 1 the product of the smallest k primes not dividing the predecessor yields a prime for these values of k.

%C See A209296 for a fuller description, a program and examples.

%C a(21)=3085 refers to a 12207-digit prime.

%K nonn

%O 1,2

%A _James G. Merickel_, Jan 03 2013