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A219571 Number of n X n arrays of the minimum value of corresponding elements and their horizontal or vertical neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 n X n array 0

%I #5 Dec 18 2015 18:18:22

%S 4,13,415,18564,2399643,1391739384

%N Number of n X n arrays of the minimum value of corresponding elements and their horizontal or vertical neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 n X n array

%C Diagonal of A219578

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Nov 23 2012

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Last modified April 24 04:02 EDT 2024. Contains 371918 sequences. (Running on oeis4.)