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Number of nX6 0..6 arrays with every nonzero element less than or equal to some NW, E or S neighbor
1

%I #5 Mar 31 2012 12:36:57

%S 1,7959529,312327861320,4878810545594780,63659189467084692929,

%T 915339495505231856501713,13871923767653971368743823518,

%U 207909111090413537890396052021099,3082221608346354059412848837196702297

%N Number of nX6 0..6 arrays with every nonzero element less than or equal to some NW, E or S neighbor

%C Column 6 of A203506

%H R. H. Hardin, <a href="/A203504/b203504.txt">Table of n, a(n) for n = 1..20</a>

%e Some solutions for n=5

%e ..2..5..1..0..1..6....5..0..3..0..3..6....1..3..2..5..4..1....3..1..0..0..4..4

%e ..2..5..1..6..1..6....5..1..6..3..0..6....3..6..6..5..4..5....6..6..1..4..2..4

%e ..6..6..1..6..2..6....5..0..6..4..6..6....1..4..6..5..6..5....1..6..0..4..3..0

%e ..3..6..0..6..6..6....5..2..6..3..6..6....0..5..2..3..6..5....4..1..2..4..6..2

%e ..4..4..4..4..4..6....5..6..6..6..2..4....6..6..6..6..6..6....4..4..2..2..6..6

%K nonn

%O 1,2

%A _R. H. Hardin_ Jan 02 2012