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%I #5 Mar 31 2012 12:36:09
%S 9136352,1292583020,184351404608,26257519475028,3739210796619416,
%T 532523771629995532,75840322054047845954,10800899342885484556064,
%U 1538224290587862925230372,219068281015870859530254112
%N Number of (n+2)X4 0..3 arrays with no 2X2 subblock sum equal to any diagonal or antidiagonal neighbor 2X2 subblock sum
%C Column 2 of A187676
%H R. H. Hardin, <a href="/A187675/b187675.txt">Table of n, a(n) for n = 1..55</a>
%e Some solutions for 6X4
%e ..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
%e ..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
%e ..0..2..0..2....0..2..0..2....0..2..0..2....0..2..0..2....0..2..0..2
%e ..1..0..2..0....1..0..2..2....2..0..2..2....1..0..2..2....2..0..2..0
%e ..1..3..1..2....2..3..0..1....0..0..3..1....2..2..0..1....2..2..3..1
%e ..2..1..1..0....3..3..2..3....0..0..1..1....2..3..1..1....3..2..3..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 12 2011
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