%I A001265
%S A001265 0,1,3,7,3,5,31,3,3,7,127,3,5,17,7,73,3,11,31,23,89,3,3,5,7,13,8191,
%T A001265 3,43,127,7,31,151,3,5,17,257,131071,3,3,3,7,19,73,524287,3,5,5,11,
%U A001265 31,41,7,7,127,337,3,23,89,683,47,178481,3,3,5,7,13,17,241
%N A001265 Table T(n,k) in which n-th row lists prime factors of 2^n - 1 (n >= 2), 
               with repetition.
%C A001265 For n>1, the length of row n is A046051(n). - T. D. Noe (noe(AT)sspectra.com), 
               Aug 06 2007
%D A001265 J. Brillhart et al., Factorizations of b^n +- 1. Contemporary Mathematics, 
               Vol. 22, Amer. Math. Soc., Providence, RI, 2nd edition, 1985; and 
               later supplements.
%H A001265 T. D. Noe, <a href="b001265.txt">Rows n=0..500 of triangle, flattened</
               a> (derived from Brillhart et al.)
%H A001265 Joerg Arndt, <a href="a001265.txt">Rows n=1..1200 of triangle</a> (derived 
               from Brillhart et al.)
%H A001265 J. Brillhart et al., <a href="http://www.ams.org/online_bks/conm22/">
               Factorizations of b^n +- 1</a>, Contemporary Mathematics, Vol. 22, 
               Amer. Math. Soc., Providence, RI, 3rd edition, 2002.
%H A001265 Jeroen Demeyer, <a href="http://cage.ugent.be/~jdemeyer/cunningham/">
               Machine-readable Cunningham Tables</a>
%H A001265 S. S. Wagstaff, Jr., <a href="http://www.cerias.purdue.edu/homes/ssw/
               cun/index.html">The Cunningham Project</a>
%H A001265 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               MersenneNumber.html">Mersenne Number</a>
%e A001265 0; 1; 3; 7; 3,5; 31; 3,3,7; 127; 3,5,17; ...
%Y A001265 Cf. A060443.
%Y A001265 Sequence in context: A101636 A096247 A122583 this_sequence A060443 A020810 
               A021732
%Y A001265 Adjacent sequences: A001262 A001263 A001264 this_sequence A001266 A001267 
               A001268
%K A001265 nonn,tabl
%O A001265 0,3
%A A001265 N. J. A. Sloane (njas(AT)research.att.com).