Search: id:A089339
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%I A089339
%S A089339 0,0,0,1,1,0,1,1,1,2,1,1,1,0,2,3,1,1,3,2,2,3,2,3,1,2,4,2,2,4,3,2,6,2,4,
%T A089339 5,2,2,7,2,2,6,2,3,5,4,2,4,4,3,3,3,2,8,3,5,6,3,3,7,5,4,9,2,4,5,5,4,6,3,
%U A089339 2,9,2,4,10,2,6,8,3,4,8,7,4,8,6,5,11,7,4,8,3,2,8,9,3,10,4,7,7,4,4,11,5
%N A089339 Number of primes beginning with n and of the form n concatenated with 
               p where p takes all the prime values less than n.
%C A089339 Conjecture: There are finitely many zeros in this sequence. What is the 
               largest value of n such that a(n) = 0? Perhaps n = 14.
%e A089339 a(10) = 2 and 103 and 107 are the associated primes.
%Y A089339 Cf. A089340.
%Y A089339 Sequence in context: A064272 A117479 A118404 this_sequence A127284 A120691 
               A111941
%Y A089339 Adjacent sequences: A089336 A089337 A089338 this_sequence A089340 A089341 
               A089342
%K A089339 base,nonn
%O A089339 1,10
%A A089339 Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 04 2003
%E A089339 Corrected and extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), 
               Nov 07 2003

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