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A185464 Number of (n+1)X7 binary arrays with no 2X2 subblock determinant equal to any horizontal or vertical neighbor 2X2 subblock determinant 1

%I

%S 1320,4452,27102,231636,1388736,11083678,63886624,505270226,

%T 2903085730,22962813645,131933531918,1043538136278,5995683878222,

%U 47423208533485,272471604500138,2155131419283957,12382379727663458,97939214947579914

%N Number of (n+1)X7 binary arrays with no 2X2 subblock determinant equal to any horizontal or vertical neighbor 2X2 subblock determinant

%C Column 6 of A185467

%H R. H. Hardin, <a href="/A185464/b185464.txt">Table of n, a(n) for n = 1..200</a>

%F Empirical: a(n)=38*a(n-2)+285*a(n-4)+2258*a(n-6)+6967*a(n-8)+24960*a(n-10)-27398*a(n-12)+34950*a(n-14)+8534*a(n-16)+1567*a(n-18)-849*a(n-20)-665*a(n-22)-470*a(n-24)+862*a(n-26)+264*a(n-28)+24*a(n-30) for n>36

%e Some solutions for 3X7

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 28 2011

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Last modified November 27 06:29 EST 2021. Contains 349363 sequences. (Running on oeis4.)