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Number of (n+1)X9 binary arrays with every 2X2 subblock sum equal to exactly one or two horizontal and vertical neighbor 2X2 subblock sums
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%I #4 Mar 31 2012 12:36:11

%S 11828,1694376,77627954,4280848766,228625683370

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

%C Column 8 of A188311

%e Some solutions for 3X9

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 27 2011