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A203341 Number of nX3 0..4 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors 1

%I

%S 1,25,635,9555,142167,2566719,48091042,870803077,15677729113,

%T 285592250536,5229626169635,95709720070629,1751500859436863,

%U 32083750075804047,588112814640699586,10783024853712580946

%N Number of nX3 0..4 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors

%C Column 3 of A203346

%H R. H. Hardin, <a href="/A203341/b203341.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

%e ..2..4..4....1..4..4....3..3..2....2..3..3....4..4..3....1..2..2....4..4..2

%e ..3..4..4....2..4..4....3..3..2....2..4..4....4..4..3....3..4..4....4..4..4

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Dec 31 2011

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Last modified April 14 22:47 EDT 2021. Contains 342971 sequences. (Running on oeis4.)