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A236425 Number of (n+1)X(3+1) 0..2 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise 1

%I

%S 2581,60193,1290539,24143945,414682711,6480932348,94263772244,

%T 1278900927369,16379992931866,198820398501064,2304672961745261,

%U 25596758706053645,273909225712661149,2831115529220189307

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

%C Column 3 of A236427

%H R. H. Hardin, <a href="/A236425/b236425.txt">Table of n, a(n) for n = 1..184</a>

%e Some solutions for n=2

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 25 2014

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Last modified August 12 20:01 EDT 2022. Contains 356077 sequences. (Running on oeis4.)