Search: id:A014981
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%I A014981
%S A014981 1,1,1,1,2,3,7,11,28,120,197,892,2479,4148,11687,56010,271913,
%T A014981 461529,2270882,6599404,11263855,56250108,164879269,830987861,
%U A014981 7231032935,21386730355,36802336319,109099442316,187943217386
%N A014981 a(n)=c(p(n))/p(n), where c = Perrin sequence A001608 (starting 0,2,3,
               ...) and p(n) = n-th prime.
%D A014981 An Insufficient Condition for Primality, Problem 10268, American Mathematical 
               Monthly, v. 103, n. 10, p. 911, Dec. 1996.
%H A014981 T. D. Noe, <a href="b014981.txt">Table of n, a(n) for n=1..200</a>
%Y A014981 See A001608, the main entry for the Perrin sequence.
%Y A014981 Sequence in context: A107858 A143926 A112840 this_sequence A096362 A005479 
               A120856
%Y A014981 Adjacent sequences: A014978 A014979 A014980 this_sequence A014982 A014983 
               A014984
%K A014981 nonn,easy,nice
%O A014981 1,5
%A A014981 Clark Kimberling (ck6(AT)evansville.edu), Robert G. Wilson v (rgwv(AT)rgwv.com)

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