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 A196905 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,1,2,0,4 for x=0,1,2,3,4 0

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

%S 1,6,50,1193,72523,12186565,5388703976,6460441732687,21001711750441755

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

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

%C Diagonal of A196912

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Oct 07 2011

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Last modified December 1 17:07 EST 2023. Contains 367500 sequences. (Running on oeis4.)