Search: id:A090010
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%I A090010
%S A090010 6,43,356,3333,34754,398959,4996032,67741129,988344062,15434831091,
%T A090010 256840738076,4536075689293,84731451264186,1668866557980343,
%U A090010 34563571477305464,750867999393119889,17072113130285524982
%N A090010 Permanent of (0,1)-matrix of size n X (n+d) with d=6 and n zeros not 
               on a line.
%D A090010 Brualdi, Richard A. and Ryser, Herbert J., Combinatorial Matrix Theory, 
               Cambridge NY (1991), Chapter 7.
%D A090010 Seok-Zun Song et al., Extremes of permanents of (0,1)-matrices, Lin. 
               Algebra and its Applic. 373 (2003), p. 197-210.
%F A090010 a(n) = (n+5)*a(n-1) + (n-1)*a(n-2), a(1)=6, a(2)=43
%p A090010 A090010 := proc(n,d) local r; if (n=1) then r := d elif (n=2) then r 
               := d^2+d+1 else r := (n+d-1)*A090010(n-1,d)+(n-1)*A090010(n-2,d) 
               fi; RETURN(r); end: seq(A090010(n,6),n=1..18);
%Y A090010 Cf. A000255, A000153, A000261, A001909, A001910, A055790, A090012-A090016.
%Y A090010 Sequence in context: A005786 A071541 A146966 this_sequence A062266 A159604 
               A090338
%Y A090010 Adjacent sequences: A090007 A090008 A090009 this_sequence A090011 A090012 
               A090013
%K A090010 nonn,easy
%O A090010 1,1
%A A090010 Jaap Spies (j.spies(AT)hccnet.nl), Dec 13 2003
%E A090010 Corrected by Jaap Spies (j.spies(AT)hccnet.nl), Jan 26 2004

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