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Number of (n+1)X4 0..3 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 12:36:12

%S 1936,315520,11342816,716732884,34292827560,1927798104328

%N Number of (n+1)X4 0..3 arrays with every 2X2 subblock sum equal to exactly one or two horizontal and vertical neighbor 2X2 subblock sums

%C Column 3 of A188370

%e Some solutions for 3X4

%e ..0..2..2..3....0..2..1..1....0..1..0..2....0..3..2..2....2..2..3..0

%e ..3..2..3..1....2..3..1..0....2..3..0..2....0..0..3..1....0..0..3..2

%e ..2..0..2..1....1..2..2..0....0..1..2..0....2..1..0..0....1..3..3..1

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 29 2011