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A185463 Number of (n+1)X6 binary arrays with no 2X2 subblock determinant equal to any horizontal or vertical neighbor 2X2 subblock determinant 1

%I #5 Mar 31 2012 12:36:01

%S 540,1646,8762,49670,265724,1388736,7232746,37562322,195052754,

%T 1012776710,5258562310,27304187370,141772888292,736133966262,

%U 3822262004304,19846499585644,103049855165970,535070324603120

%N Number of (n+1)X6 binary arrays with no 2X2 subblock determinant equal to any horizontal or vertical neighbor 2X2 subblock determinant

%C Column 5 of A185467

%H R. H. Hardin, <a href="/A185463/b185463.txt">Table of n, a(n) for n = 1..200</a>

%F Empirical: a(n)=3*a(n-1)+6*a(n-2)+20*a(n-3)+24*a(n-4)+64*a(n-5)+107*a(n-6)+125*a(n-7)+88*a(n-8)-76*a(n-9)+63*a(n-10)+42*a(n-11)+4*a(n-12)-10*a(n-13)-6*a(n-14)+2*a(n-15) for n>21

%e Some solutions for 3X6

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 28 2011

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Last modified April 18 03:01 EDT 2024. Contains 371767 sequences. (Running on oeis4.)