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A186901 Number of (n+1)X9 binary arrays with every 2X2 subblock determinant equal to exactly one or two horizontal and vertical neighbor 2X2 subblock determinants 1

%I #5 Mar 31 2012 12:36:06

%S 14860,19040,122820,608194,2203303,12599670,85310077,523902288,

%T 2795274149,16608468926,108609778968,679604170463,3947135094182,

%U 24085962638564,153869560878987,960883396722563,5783252949932518

%N Number of (n+1)X9 binary arrays with every 2X2 subblock determinant equal to exactly one or two horizontal and vertical neighbor 2X2 subblock determinants

%C Column 8 of A186902

%H R. H. Hardin, <a href="/A186901/b186901.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for 3X9

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 28 2011

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Last modified March 28 13:42 EDT 2024. Contains 371254 sequences. (Running on oeis4.)