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A203439 Number of nX4 0..7 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors 1

%I

%S 1,372,142108,24278164,3216740482,482229769194,79772073060022,

%T 13081859298444294,2103850173825539982,338559840680298187294,

%U 54816869874330915574505,8891041335795074855285935

%N Number of nX4 0..7 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors

%C Column 4 of A203443

%H R. H. Hardin, <a href="/A203439/b203439.txt">Table of n, a(n) for n = 1..98</a>

%e Some solutions for n=5

%e ..6..6..0..0....1..6..6..0....1..7..7..7....6..6..0..0....3..6..7..7

%e ..6..6..2..2....2..6..6..6....7..7..1..7....6..6..2..1....7..7..7..7

%e ..7..7..3..2....2..1..0..6....7..0..5..7....3..3..6..6....7..1..2..2

%e ..7..7..4..2....5..5..6..6....7..3..5..7....4..4..6..6....7..0..7..7

%e ..7..7..4..0....5..5..6..6....7..7..7..7....4..4..2..2....7..7..7..7

%K nonn

%O 1,2

%A _R. H. Hardin_ Jan 01 2012

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Last modified May 28 22:08 EDT 2022. Contains 354122 sequences. (Running on oeis4.)