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A203187 Number of nX4 0..4 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor 1

%I #5 Mar 31 2012 12:36:55

%S 95,53233,19617781,6474088455,2202928769005,754868206701309,

%T 257892549401944763,88078489175441149541,30090514056455942145831,

%U 10279936119776186239585141,3511875047988498805215621351

%N Number of nX4 0..4 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor

%C Column 4 of A203191

%H R. H. Hardin, <a href="/A203187/b203187.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 30 2011

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Last modified May 8 19:26 EDT 2024. Contains 372341 sequences. (Running on oeis4.)