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A230803 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 and at least one element with value (x(i,j)-1) mod 4, and upper left element zero 1

%I #4 Oct 30 2013 12:28:37

%S 0,34,298,10448,243746,6832578,180981600,4943014834,133700619938,

%T 3636674702224,98739423076418,2683583739212562,72911555860683184,

%U 1981321757121171674,53837913037442724742,1462968311880623328120

%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 and at least one element with value (x(i,j)-1) mod 4, and upper left element zero

%C Column 5 of A230805

%H R. H. Hardin, <a href="/A230803/b230803.txt">Table of n, a(n) for n = 1..176</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_, Oct 30 2013

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Last modified July 19 05:20 EDT 2024. Contains 374388 sequences. (Running on oeis4.)