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Half the number of lower triangles of an (n+1)X(n+1) 0..4 array with no element equal to the average of its horizontal and vertical neighbors
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%I #4 Mar 31 2012 12:36:22

%S 36,3638,1674043,3703163910,38969955227338,1946585305112431165,

%T 461761593540314858209528,520265339158575595235640177020

%N Half the number of lower triangles of an (n+1)X(n+1) 0..4 array with no element equal to the average of its horizontal and vertical neighbors

%C Column 4 of A194615

%e Some solutions for 3X3

%e ..3......2......2......0......1......4......4......3......1......3......1

%e ..0.4....0.3....4.2....3.1....2.2....0.1....1.1....4.0....2.3....1.0....4.4

%e ..1.3.1..4.0.3..4.2.1..4.1.4..2.3.1..0.3.0..4.2.3..3.1.4..0.1.2..1.3.2..2.3.0

%K nonn

%O 1,1

%A _R. H. Hardin_ Aug 30 2011