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A186937 Number of (n+1)X8 binary arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces 1

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

%S 2688,108128,1152312,16124472,199197496,2731872328,35582947920,

%T 475637108896,6259259510232,83202139545720,1098854338919104,

%U 14592496893162664,192979665562053704,2559688265009129904

%N Number of (n+1)X8 binary arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces

%C Column 7 of A186939

%H R. H. Hardin, <a href="/A186937/b186937.txt">Table of n, a(n) for n = 1..94</a>

%e Some solutions for 4X8

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 01 2011

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Last modified April 15 17:01 EDT 2024. Contains 371693 sequences. (Running on oeis4.)