A197063 - OEIS

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

%S 1,5,76,3466,645970,387792259,814152081238,5880410307808966,

%T 145748906353392828573

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

%C Every 0 is next to 0 4'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 2's

%C Diagonal of A197069

%e Some solutions for n=4

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

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

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

%e ..0..0..0..0....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 09 2011