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A197091 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,4,0,0,1 for x=0,1,2,3,4 0

%I #6 Dec 18 2015 18:17:49

%S 1,7,74,3477,457357,183439730,227951140324,864930843239459,

%T 10066466828015680364,359074320635161326740035

%N Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,4,0,0,1 for x=0,1,2,3,4

%C Every 0 is next to 0 4's, every 1 is next to 1 4's, every 2 is next to 2 0's, every 3 is next to 3 0's, every 4 is next to 4 1's

%C Diagonal of A197098

%e Some solutions containing all values 0 to 4 for n=4

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Oct 10 2011

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Last modified April 13 10:11 EDT 2024. Contains 371640 sequences. (Running on oeis4.)