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Number of (n+2)X(n+2) 0..7 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order
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%I #5 Mar 31 2012 12:36:01

%S 6842284,21536560306,84722449466168,378372621022753476,

%T 1812817799965228636502,9008824580891342846197566,

%U 45497009931939204350899288292

%N Number of (n+2)X(n+2) 0..7 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order

%C Diagonal of A185435

%e Some solutions for 4X4

%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..4....0..0..0..0....0..0..0..0....0..0..0..4....0..0..0..4

%e ..0..1..5..2....0..1..4..6....0..0..0..2....0..0..7..3....0..0..6..6

%e ..0..3..7..5....0..2..7..1....2..4..6..5....0..5..4..5....0..7..2..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 27 2011