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Number of nX5 0..4 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 5, and upper left element zero
1

%I #4 Oct 18 2013 05:42:14

%S 0,2,842,88580,6605632,501998702,36506815072,2615818813066,

%T 188195658264154,13518798637898886,970332017010857376,

%U 69648203212678610278,4999249684402345247530,358823855095471734807470

%N Number of nX5 0..4 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 5, and upper left element zero

%C Column 5 of A230398

%H R. H. Hardin, <a href="/A230396/b230396.txt">Table of n, a(n) for n = 1..23</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_, Oct 18 2013