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Number of nX4 0..3 arrays with every repeated value in every row greater than or equal to, and in every column greater than, the previous repeated value.
1

%I #4 Jan 23 2016 10:00:34

%S 250,62500,12067722,2208460532,370962601314,58977586280183,

%T 8920181825287255,1295459314730053526,181620283990314798496,

%U 24698703052360112375559,3269943855458863743367027

%N Number of nX4 0..3 arrays with every repeated value in every row greater than or equal to, and in every column greater than, the previous repeated value.

%C Column 4 of A267974.

%H R. H. Hardin, <a href="/A267972/b267972.txt">Table of n, a(n) for n = 1..42</a>

%e Some solutions for n=2

%e ..0..1..0..3....0..1..0..0....3..2..1..1....2..0..3..0....0..3..2..0

%e ..3..1..3..0....0..3..1..2....2..3..2..2....0..3..2..1....1..2..2..0

%Y Cf. A267974.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 23 2016