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A197468 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 0,1,0,0,0 for x=0,1,2,3,4.

%I A197468 #8 Jun 02 2025 04:56:30
%S A197468 1,2,26,184,5408,165200,16544206,2117012786,779857304215,
%T A197468 396015611721478,546971557228648382
%N A197468 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 0,1,0,0,0 for x=0,1,2,3,4.
%C A197468 Every 0 is next to 0 0's, every 1 is next to 1 1's, every 2 is next to 2 0's, every 3 is next to 3 0's, every 4 is next to 4 0's
%C A197468 Diagonal of A197475
%e A197468 Some solutions containing all values 0 to 4 for n=4
%e A197468 ..1..2..0..2....0..3..0..2....1..1..0..1....2..0..3..0....2..0..2..1
%e A197468 ..1..0..4..0....2..0..4..0....2..0..3..1....0..4..0..1....0..4..0..1
%e A197468 ..0..3..0..3....1..3..0..1....0..4..0..2....3..0..2..1....3..0..4..0
%e A197468 ..1..1..2..0....1..0..2..1....2..0..3..0....0..1..1..0....0..3..0..2
%K A197468 nonn
%O A197468 1,2
%A A197468 _R. H. Hardin_ Oct 15 2011