Search: id:A002234
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%I A002234 M0820 N0311
%S A002234 2,3,6,30,75,81,115,123,249,362,384,462,512,751,822,5312,7755,9531,
%T A002234 12379,15822,18885,22971,23005,98726,143018,151023,667071,1195203,
%U A002234 1268979,1467763,2013992,2367906,3752948
%N A002234 Numbers n such that the Woodall number n*2^n - 1 is prime.
%C A002234 No other terms < 6500000 - John Blazek, May 14 2009
%D A002234 J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 115, p. 40, Ellipses, 
               Paris 2008.
%D A002234 H. Riesel, Lucasian criteria for the primality of N=h.2^n-1, Math. Comp., 
               23 (1969), 869-875.
%D A002234 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A002234 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%H A002234 Ray Ballinger, <a href="http://www.prothsearch.net/woodall.html">Woodall 
               Primes: Definition and Status</a>
%H A002234 Ray Ballinger and Wilfrid Keller, <a href="http://www.prothsearch.net/
               woodall.html">Woodall numbers</a>
%H A002234 C. K. Caldwell, <a href="http://primes.utm.edu/glossary/page.php?sort=WoodallNumber">
               Woodall Numbers</a>
%H A002234 J. DeMaio, <a href="http://science.kennesaw.edu/~jdemaio/generali.htm">
               Generalized Woodall Numbers</a>
%H A002234 R. Ondrejka, <a href="http://www.utm.edu/research/primes/lists/top_ten/
               ">The Top Ten: a Catalogue of Primal Configurations</a>
%H A002234 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               WoodallNumber.html">Woodall Numbers</a>
%H A002234 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               IntegerSequencePrimes.html">Integer Sequence Primes</a>
%Y A002234 Cf. A050918 (for the actual primes), A003261, A005849.
%Y A002234 Sequence in context: A018318 A051717 A108326 this_sequence A074005 A145499 
               A082611
%Y A002234 Adjacent sequences: A002231 A002232 A002233 this_sequence A002235 A002236 
               A002237
%K A002234 nonn,nice,hard
%O A002234 1,1
%A A002234 N. J. A. Sloane (njas(AT)research.att.com), Simon Plouffe (simon.plouffe(AT)gmail.com)
%E A002234 a(27) communicated by Mohammed Bouayoun (bouyao(AT)wanadoo.fr), Mar 15 
               2004
%E A002234 1195203 found by M. Rodenkirch, but the region from 1020000 to 1195203 
               is incompletely searched; contributed by Eric Weisstein (eric(AT)weisstein.com), 
               Nov 29, 2005
%E A002234 More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 05 2008
%E A002234 1467763, 2013992, 2367906, 3752948 from John Blazek, May 14 2009

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