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A203845 Number of nX7 0..3 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors 1

%I

%S 1,3502,4683983,2828543595,1851737877261,1343321735549790,

%T 962798716189325069,683655464831096685412,487678114181526321589432,

%U 348497070880545014679320935,248863069745305150479109312811

%N Number of nX7 0..3 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors

%C Column 7 of A203846

%H R. H. Hardin, <a href="/A203845/b203845.txt">Table of n, a(n) for n = 1..12</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Jan 06 2012

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Last modified October 18 06:50 EDT 2021. Contains 348066 sequences. (Running on oeis4.)