Search: id:A089479
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%I A089479
%S A089479 1,1,9,6,1,265,150,69,18,9,0,1,27713,13032,10800,4992,4254,1440,1536,
%T A089479 576,648,24,288,96,48,0,72,0,0,0,16,0,0,0,0,0,1,10363361,3513720,
%U A089479 4339440,2626800,3015450,1451400,1872800,962400,1295700,425400,873000
%N A089479 Triangle T(n,k) read by rows, where T(n,k) = number of times the permanent 
               of a real n X n (0,1)-matrix takes the value k, for n >= 1, 0 <= 
               k <= n!.
%C A089479 The last element of each row is 1, corresponding to the n X n "all 1" 
               matrix with permanent=n!. The first 4 rows were provided by Wouter 
               Meeussen (wouter.meeussen(AT)pandora.be). The 6th row was computed 
               by Gordon Royle (gordon(AT)maths.uwa.edu.au): 13906734081,2722682160,
               4513642920,3177532800,4466769300,2396826720,3710999520, 2065521600,
               3253760550,1468314000,2641593600,1350475200,2210277600,1034061120,
               ...
%Y A089479 T(n, 0)=A088672(n), T(n, 1)=A089482(n). The n-th row of the table contains 
               A087983(n) nonzero entries. For n>2 A089477(n) gives the position 
               of the first zero entry in the n-th row. Cf. A089480 occurrence counts 
               for permanents of non-singular (0, 1)-matrices, A089481 occurrence 
               counts for permanents of singular (0, 1)-matrices.
%Y A089479 Sequence in context: A021108 A021840 A064230 this_sequence A154899 A011219 
               A019961
%Y A089479 Adjacent sequences: A089476 A089477 A089478 this_sequence A089480 A089481 
               A089482
%K A089479 nonn,tabf
%O A089479 1,3
%A A089479 Hugo Pfoertner (hugo(AT)pfoertner.org), Nov 05 2003

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