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Number of (n+1)X(3+1) 0..2 arrays with the sum of each 2X2 subblock two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise
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%I #4 Jan 15 2014 09:04:24

%S 2996,88732,2721271,68186440,1669079300,36221011849,753688651636,

%T 14525190680041,268128519251558,4694013468185380,79134915757328335,

%U 1283261845996157070,20172199821307986019,307868273991969443393

%N Number of (n+1)X(3+1) 0..2 arrays with the sum of each 2X2 subblock two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise

%C Column 3 of A235756

%H R. H. Hardin, <a href="/A235754/b235754.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 15 2014