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%I #4 Jan 26 2016 12:20:20
%S 4,81,4096,378225,56791296,12650850576,3926389806144,1621309443347169,
%T 859957083064464100,569966660957291549809,461690884178405990127504,
%U 448823671401604409584451856,515728792901852626366779599104
%N Number of 2Xn 0..n arrays with every repeated value in every row and column greater than or equal to the previous repeated value.
%C Row 2 of A268103.
%H R. H. Hardin, <a href="/A268105/b268105.txt">Table of n, a(n) for n = 1..26</a>
%e Some solutions for n=5
%e ..0..0..0..5..5....0..0..0..3..0....0..0..0..3..4....0..0..1..1..0
%e ..0..3..5..2..3....0..0..3..0..4....0..0..1..3..3....0..3..4..3..4
%Y Cf. A268103.
%K nonn
%O 1,1
%A _R. H. Hardin_, Jan 26 2016