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Number of nX5 0..3 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero
1

%I #4 Nov 03 2013 07:31:50

%S 0,68,1272,27346,585880,12582344,270096962,5799242344,124514793312,

%T 2673473185328,57402651030122,1232504863875396,26463395615097866,

%U 568201785697961358,12199995225532283910,261948999886945680148

%N Number of nX5 0..3 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero

%C Column 5 of A231063

%H R. H. Hardin, <a href="/A231060/b231060.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 03 2013