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Number of n X 6 arrays of the minimum value of corresponding elements and their horizontal, vertical, diagonal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 n X 6 array.
1

%I #8 Jul 09 2014 02:02:01

%S 21,21,308,2215,16159,105936,715430,4968426,34708110,235821971,

%T 1533422780,9520703855,56784842083,327953470848,1845044605038,

%U 10141820371575,54522037417751,286787858534562,1477004659546184

%N Number of n X 6 arrays of the minimum value of corresponding elements and their horizontal, vertical, diagonal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 n X 6 array.

%C Column 6 of A219915.

%H R. H. Hardin, <a href="/A219913/b219913.txt">Table of n, a(n) for n = 1..22</a>

%e Some solutions for n=3:

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 01 2012