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A153363 Number of zig-zag paths from top to bottom of a rectangle of width 9 with n rows whose color is that of the top right corner 5

%I #7 Sep 02 2012 12:26:03

%S 5,8,16,28,56,100,200,360,720,1300,2600,4700,9400,17000,34000,61500,

%T 123000,222500,445000,805000,1610000,2912500,5825000,10537500,

%U 21075000,38125000,76250000,137937500,275875000,499062500,998125000,1805625000

%N Number of zig-zag paths from top to bottom of a rectangle of width 9 with n rows whose color is that of the top right corner

%H Joseph Myers, <a href="http://www.polyomino.org.uk/publications/2008/bmo1-2009-q1.pdf">BMO 2008--2009 Round 1 Problem 1---Generalisation</a>

%F Empirical g.f.: x*(5+8*x-9*x^2-12*x^3+x^4)/(1-5*x^2+5*x^4). [_Colin Barker_, Sep 02 2012]

%Y A153362, A153364, A153365, A153366, A153367

%K easy,nonn

%O 1,1

%A _Joseph Myers_, Dec 24 2008

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Last modified March 1 10:18 EST 2024. Contains 370432 sequences. (Running on oeis4.)