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A226716 Number of nX7 (-1,0,1) arrays of determinants of 2X2 subblocks of some (n+1)X8 binary array 1

%I

%S 1331,469273,67402167,9326184515,1412775737517,219013376708219,

%T 33686064493125445,5158814075664351755,790219064809543544019,

%U 121119067554834244254625,18565905217863946042822197

%N Number of nX7 (-1,0,1) arrays of determinants of 2X2 subblocks of some (n+1)X8 binary array

%C Column 7 of A226717

%H R. H. Hardin, <a href="/A226716/b226716.txt">Table of n, a(n) for n = 1..15</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jun 15 2013

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Last modified April 5 10:33 EDT 2020. Contains 333239 sequences. (Running on oeis4.)