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Number of (n+2)X5 binary arrays with each 3X3 subblock singular
1

%I #5 Mar 31 2012 12:36:04

%S 12278,224698,4071834,69579654,1231779874,21790214094,384595851458,

%T 6808982811886,120583672850434,2135856648045198,37846168273108354,

%U 670699974248523022,11887026695049436738,210692726936282537230

%N Number of (n+2)X5 binary arrays with each 3X3 subblock singular

%C Column 3 of A186052

%H R. H. Hardin, <a href="/A186046/b186046.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for 4X5

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 11 2011