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A084199 Smallest prime q<prime(n) such that q+1 divides prime(n)+1, a(n)=1 if no such q exists. 0

%I #3 Mar 30 2012 18:50:35

%S 1,1,2,3,2,1,2,3,2,2,3,1,2,3,2,2,2,1,3,2,1,3,2,2,13,2,3,2,1,2,3,2,2,3,

%T 2,3,1,3,2,2,2,13,2,1,2,3,3,3,2,1,2,2,1,2,2,2,2,3,1,2,3,2,3,2,1,2,3,1,

%U 2,13,2,2,3,1,3,2,2,1,2,1,2,1,2,13,3,2,2,1,2,3,2,2,3,2,3,2,2,2,3,1,3,2,2

%N Smallest prime q<prime(n) such that q+1 divides prime(n)+1, a(n)=1 if no such q exists.

%C a(n)=1 iff A084196(n)=0;

%C conjecture: A008578 = range of values > 1.

%K nonn

%O 1,3

%A _Reinhard Zumkeller_, May 18 2003

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