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A186938 Number of (n+1)X9 binary arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces 1

%I

%S 7528,431656,5769904,102475864,1627815216,28477050608,475637108896,

%T 8132915749352,137957613500896,2350443973085288,39973429999524952,

%U 680134904601046536,11574046354140738136,196965440910144079296

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

%C Column 8 of A186939

%H R. H. Hardin, <a href="/A186938/b186938.txt">Table of n, a(n) for n = 1..25</a>

%e Some solutions for 4X9

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 01 2011

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Last modified May 28 08:23 EDT 2022. Contains 354112 sequences. (Running on oeis4.)