Search: id:A089475
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%I A089475
%S A089475 1,1,3,9,31,149
%N A089475 Number of different values taken by the permanent of a real nonsingular 
               (0,1)-matrix of order n.
%C A089475 This sequence was first provided by Jaap Spies (j.spies(AT)hccnet.nl).
%e A089475 a(4)=9 because the permanents of non-singular 4 X 4 (0,1)-matrices can 
               take the
%e A089475 values 1,2,..,7,9,11.
%Y A089475 A055165, A089480 give occurrence counts for permanents of non-singular 
               (0, 1)-matrices, A089476 different permanents of singular (0, 1)-matrices.
%Y A089475 Sequence in context: A090595 A027040 A111063 this_sequence A099999 A039749 
               A034538
%Y A089475 Adjacent sequences: A089472 A089473 A089474 this_sequence A089476 A089477 
               A089478
%K A089475 more,nonn
%O A089475 1,3
%A A089475 Hugo Pfoertner (hugo(AT)pfoertner.org), Nov 11 2003
%E A089475 a(6) from Jaap Spies (j.spies(AT)hccnet.nl), Nov 12 2003

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