Search: id:A087983
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%I A087983
%S A087983 2,3,6,16,51,220,1179
%N A087983 Number of different values taken by permanent of n X n (0,1)-matrix.
%H A087983 <a href="Sindx_Mat.html#binmat">Index entries for sequences related to 
               binary matrices</a>
%e A087983 For a 4 X 4 matrix the 16 possible permanents and their multiplicieties 
               are:
%e A087983 {{0, 27713}, {1, 13032}, {2, 10800}, {3, 4992}, {4, 4254}, {5, 1440}, 
               {6, 1536}, {7, 576}, {8, 648}, {9, 24}, {10, 288}, {11, 96}, {12, 
               48}, {14, 72}, {18, 16}, {24, 1}}
%Y A087983 Cf. A089477, A089479, A089472.
%Y A087983 Sequence in context: A089872 A006402 A145860 this_sequence A103593 A006449 
               A102980
%Y A087983 Adjacent sequences: A087980 A087981 A087982 this_sequence A087984 A087985 
               A087986
%K A087983 nonn,more
%O A087983 1,1
%A A087983 Wouter Meeussen (wouter.meeussen(AT)pandora.be), Oct 29 2003
%E A087983 a(6)=220 from Gordon Royle (gordon(AT)maths.uwa.edu.au), Nov 05 2003
%E A087983 a(7) from Giovanni Resta (g.resta(AT)iit.cnr.it), Mar 29 2006

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