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A208685 Number of nX5 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 1 and 1 0 1 vertically 1

%I #5 Mar 31 2012 12:37:24

%S 16,256,768,2889,12096,41013,133207,444912,1448128,4616800,14733663,

%T 46884096,148366461,468807885,1480447408,4669224000,14715790096,

%U 46366826149,146050380000,459933577353,1448231824455,4559797881648

%N Number of nX5 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 1 and 1 0 1 vertically

%C Column 5 of A208688

%H R. H. Hardin, <a href="/A208685/b208685.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 4*a(n-1) -3*a(n-2) +10*a(n-3) -27*a(n-4) -6*a(n-5) -15*a(n-6) +51*a(n-7) +41*a(n-8) +31*a(n-9) -51*a(n-10) -29*a(n-11) -27*a(n-12) +15*a(n-13) +6*a(n-14) +3*a(n-15) -4*a(n-16) +a(n-17) +a(n-19)

%e Some solutions for n=4

%e ..0..1..1..1..1....0..1..1..1..1....0..1..0..1..1....1..1..0..1..1

%e ..0..1..0..1..0....1..1..1..1..0....1..1..1..1..1....1..1..1..1..0

%e ..1..1..0..1..0....0..1..0..1..0....0..1..0..1..0....0..1..0..1..0

%e ..0..1..0..1..0....0..1..0..1..0....0..1..0..1..0....0..1..0..1..1

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 01 2012

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Last modified April 19 23:15 EDT 2024. Contains 371798 sequences. (Running on oeis4.)