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 A196689 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 2,1,3,0,4 for x=0,1,2,3,4 0

%I #6 Dec 18 2015 18:17:48

%S 1,5,76,3394,546956,279754939,465819437152,2520182960610600,

%T 44155322347113863050,2500562115488233367551895

%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 2,1,3,0,4 for x=0,1,2,3,4

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

%C Diagonal of A196696

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Oct 05 2011

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Last modified May 20 19:00 EDT 2024. Contains 372720 sequences. (Running on oeis4.)