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Smallest prime p such that n divides one of f(p)-1, f(p) or f(p)+1, where f(p) is product of primes <= p, or 0 if no such p exists.
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%I #11 Sep 20 2012 16:52:14

%S 2,2,2,0,3,3,3,0,0,5,7,0,13,7,5,0,17,0,7,0,7,11,23,0,0,13,0,0,5,5,5,0,

%T 11,17,7,0,23,19,13,0,41,7,43,0,0,23,47,0,0,0,17,0,19,0,11,0,19,29,13,

%U 0,17,31,0,0,13,11,67,0,23,7,71,0,53,37,0,0,11,13,29,0,0,41,83,0,17,43,29,0

%N Smallest prime p such that n divides one of f(p)-1, f(p) or f(p)+1, where f(p) is product of primes <= p, or 0 if no such p exists.

%D M. R. Mudge, Smarandache Notions Journal, University of Craiova, Vol. VII, No. 1, 1996.

%K nonn

%O 1,1

%A Michael R. Mudge (Amsorg(AT)aol.com)

%E _David W. Wilson_ points out that the published beginning is incorrect and has extended this sequence and supplied a better description.