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Number of (n+1)X(4+1) 0..3 arrays with no element greater than all horizontal neighbors or equal to all vertical neighbors
1

%I #4 Mar 07 2014 07:21:42

%S 5008,191086,25080064,2531484558,265992385206,27816714540010,

%T 2912187511240098,304661966072695432,31883006383052084900,

%U 3336384421665707208520,349125379127023083318084

%N Number of (n+1)X(4+1) 0..3 arrays with no element greater than all horizontal neighbors or equal to all vertical neighbors

%C Column 4 of A238929

%H R. H. Hardin, <a href="/A238926/b238926.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 07 2014