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%I #5 Jan 15 2014 12:44:21
%S 2612,68942,1581879,30969609,545929374,8741113000,130024832317,
%T 1814248350284,24045049867402,304974560820729,3731440079988996,
%U 44289621774986740,512802242862242358,5816732007527994942
%N Number of (n+1)X(2+1) 0..3 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise
%C Column 2 of A235779
%H R. H. Hardin, <a href="/A235777/b235777.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=2
%e ..1..3..1....2..0..3....3..0..0....2..1..2....3..1..3....1..2..1....1..0..0
%e ..3..2..1....2..0..0....0..2..0....0..3..1....2..1..1....2..0..0....2..2..2
%e ..2..0..0....1..2..1....1..3..3....2..1..3....0..1..3....2..3..2....1..0..1
%K nonn
%O 1,1
%A _R. H. Hardin_, Jan 15 2014