Search: id:A006553
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%I A006553 M1575
%S A006553 1,2,6,10,18,40,46,86,118,170,1172,1698,1810,2268,4338,18362,72662,
%T A006553 88392,94110,161538,168660,292340,401208
%N A006553 Numbers n such that n*3^n - 1 is prime.
%D A006553 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%H A006553 Steven Harvey, <a href="http://www.geocities.com/harvey563/GeneralizedWoodallPrimes.txt">
               Generalized Woodall Search</a>
%Y A006553 Sequence in context: A095357 A095358 A084481 this_sequence A054273 A127567 
               A005993
%Y A006553 Adjacent sequences: A006550 A006551 A006552 this_sequence A006554 A006555 
               A006556
%K A006553 hard,nonn
%O A006553 1,2
%A A006553 N. J. A. Sloane (njas(AT)research.att.com).
%E A006553 More terms from Jud McCranie (j.mccranie(AT)comcast.net)
%E A006553 More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 05 2008

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