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Number of n X n 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it or three plus the sum of the elements diagonally to its northwest, modulo 4.
0

%I #7 Jun 09 2023 21:43:50

%S 1,5,37,771,91879,28061567,43398047802

%N Number of n X n 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it or three plus the sum of the elements diagonally to its northwest, modulo 4.

%C Diagonal of A240192.

%e Some solutions for n=4

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

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

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

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

%Y Cf. A240192.

%K nonn

%O 1,2

%A _R. H. Hardin_, Apr 02 2014