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A186834 Number of (n+2)X5 binary arrays with 3X3 subblock sums nondecreasing rightwards and downwards. 1

%I #8 Jan 27 2013 02:21:48

%S 14112,147428,1537476,15478835,111211414,798816802,5699887192,

%T 32614678623,186554693948,1065318863852,5237351544896,25736501670853,

%U 126375975163794,558574172464123,2467874141143136,10897815394363554

%N Number of (n+2)X5 binary arrays with 3X3 subblock sums nondecreasing rightwards and downwards.

%C Column 3 of A186840

%H R. H. Hardin, <a href="/A186834/b186834.txt">Table of n, a(n) for n = 1..169</a>

%e Some solutions for 4X5

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 27 2011

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